Reference:Movements: Difference between revisions

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<div class="rp-era"><div class="rp-era-name">Oyster Perpetual automatic</div><div class="rp-chips">[[#cal-1130-rolex-automatic|1130 OP]] [[#cal-1160|1160]] [[#cal-1161|1161]]</div></div>

<div class="rp-era"><div class="rp-era-name">Bubbleback / early automatic</div><div class="rp-chips">[[#cal-520|520]] [[#cal-50|50]] [[#cal-620|620]] [[#cal-630|630]] [[#cal-635|635]] [[#cal-105-hunter|700/710]] [[#cal-600|600]] [[#cal-59|59]] [[#cal-a260|A260]] [[#cal-a296|A296]] [[#cal-a295|A.295]] [[#cal-645|645]] [[#cal-740|740]] [[#cal-745|745]]</div></div>

<div class="rp-era"><div class="rp-era-name">Bubbleback / early automatic</div><div class="rp-chips">[[#cal-520|520]] [[#cal-420|420]] [[#cal-50|50]] [[#cal-620|620]] [[#cal-630|630]] [[#cal-635|635]] [[#cal-105-hunter|700/710]] [[#cal-600|600]] [[#cal-59|59]] [[#cal-a260|A260]] [[#cal-a296|A296]] [[#cal-a295|A.295]] [[#cal-645|645]] [[#cal-740|740]] [[#cal-745|745]]</div></div>

<div class="rp-era"><div class="rp-era-name">Calendar / moonphase</div><div class="rp-chips">[[#cal-a295-cpl|A.295 CPL]]</div></div>

<div class="rp-era"><div class="rp-era-name">Early Oyster (lot attribution)</div><div class="rp-chips">[[#cal-2849-note|2849 (Cal. 500 attribution)]]</div></div>

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Bubbleback and early Oyster Perpetual references use a distinct family of self-winding calibers. They followed the Prince's manual shaped movements and preceded the standardized post-war automatic line. The "bubble" refers to the domed caseback needed to clear the full-rotor automatic mechanism. It was not a bumper system, although many competing automatics still used one.

=== Cal. 420 ===

{| class="wikitable" style="width:280px; font-size:90%;"

! detail

! value

|-

| type / size

| Automatic centre-seconds; catalogue prints “7¾” and separately lists Ø 19.4 mm

|-

| reference attribution

| Possible ref. [[Reference:5002|5002]] attribution from James Dowling; 5002 catalogue descriptions of subsidiary seconds conflict with Cal. 420’s centre-seconds description

|}

Rolex's parts catalogue establishes Cal. 420's type and specifications, but it does not list ref. 5002 as a fitment. James Dowling's reference-specific listing assigns the caliber to a 5002. The seconds-layout mismatch leaves that assignment uncertain; available auction images show no readable movement stamp. Antiquorum describes an 8-ligne movement size in one 5002 catalogue entry. [https://www.clubderelojeria.com/comunicaciones/R/ROLEX/rolex170/rolex%20170.pdf Rolex spare-parts catalogue ref. 170, Cal. 420]; [https://www.ukwatches.com/product/007-rolex-14k-1950s-oyster-perpetual-ladys-bubbleback/ James Dowling, ref. 5002 listing]

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Antiquorum gives 26 jewels for its Cal. 740 example. That count should be kept with the source's description. A different count in a reference table may reflect a counting convention or a different execution; the number alone does not settle which.

Antiquorum also assigns Cal. 740 to manual-wind [[Reference:6094|ref. 6094]], usually with 17 jewels. Its 2008 lot labels the case 6094/6294; the 2010 and 2012 lots identify ref. 6094 alone. The 2018 listing for case 882812 calls the watch self-winding in its headline while the specification field gives Cal. 740. ~~Keep these as lot~~-~~level attributions: the records do not establish that the 6094~~ Cal. 740 ~~is the~~ automatic 26-jewel movement documented here for ~~ref~~. ~~4467~~. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-203-530 Antiquorum, lot 530]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-242-134 Antiquorum, lot 134]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-tropical-lot-262-291 Antiquorum, lot 291]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-oysterdate-precision-lot-313-138 Antiquorum, lot 138].

Antiquorum also assigns Cal. 740 to manual-wind [[Reference:6094|ref. 6094]], usually with 17 jewels. Its 2008 lot labels the case 6094/6294; the 2010 and 2012 lots identify ref. 6094 alone. The 2018 listing for case 882812 calls the watch self-winding in its headline while the specification field gives Cal. 740. Watch-Wiki lists Cal. 740 as an automatic 18-jewel Datejust movement; Antiquorum describes the ref. 4467 Cal. 740 documented here as automatic with 26 jewels. These records use Cal. 740 for different movement descriptions. A separate 6094 photograph shows Rolex and 17 jewels, but no legible caliber stamp; it cannot confirm the auction attribution. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-203-530 Antiquorum, lot 530]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-242-134 Antiquorum, lot 134]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-tropical-lot-262-291 Antiquorum, lot 291]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-oysterdate-precision-lot-313-138 Antiquorum, lot 138]; [https://everywatch.com/rolex/oysterdate-precision/6094/watch-12440774 EveryWatch transcription of Bonhams, lot 85]; [https://www.hashtagwatchco.com/products/1953-rolex-oysterdate-precision-6094-white-red-date-stainless-steel-manual-wristwatch HASHTAGWATCHCO, ref. 6094 listing photographs]; [https://www.watch-wiki.net/doku.php?id=rolex_calibres Watch-Wiki, Rolex calibre index].

Surviving examples can have replacement movements or parts. A reference launch date should not be assigned automatically to the movement now inside a particular case.

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The pallet fork runs in jewels, while the escape wheel has shock-mounted settings and cap jewels on both pivots, matching the treatment of the balance. Indirect centre seconds, driven from the fourth wheel through a friction-sprung pinion, can produce seconds-hand flutter even in a healthy movement. The earliest examples may lack shock protection; Antiquorum's 1946 ref. 4560 description names none.

Documented fitments include refs. 3745, 4560, 6420, 6422, 6426/6427, 6466, 6480, 6482, 6494, 9083 and 9659. Bonhams also records a ref. 6694 with a III.60 caseback date on Cal. 1210.

Documented fitments include refs. 3745, 4560, 6420, 6422, 6426/6427, 6466, 6480, 6482, 6494, 9083 and 9659. Bonhams also records a ref. 6694 with a III.60 caseback date on Cal. 1210. Vintage Watch Centre also assigns Cal. 1210 to its ref. 4219, case 056827, but no caliber engraving is visible in the movement photo. The dealer dates the case circa 1948; White's Field Manual lists Cal. 1210 as 1954–1964 on PDF page 91. These conflicting attributions remain tied to that one watch. [[Reference:4219|The 4219 article]] records the discrepancy. [https://www.vintagewatchcentre.com/product/rolex-precision-ref-4219-c1948/ Vintage Watch Centre]; [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual, PDF p. 91].

@@ Line 16: / Line 16: @@
 <div class="rp-era"><div class="rp-era-name">Prince (shaped)</div><div class="rp-chips">[[#cal-300|300]] [[#cal-300-ts|7½ T.S. 300]] [[#cal-310|310]] [[#cal-360-hw|360 HW]] [[#cal-350-ts|350 T.S.]] [[#cal-1759|1759]]</div></div>
 <div class="rp-era"><div class="rp-era-name">Oyster Perpetual automatic</div><div class="rp-chips">[[#cal-1130-rolex-automatic|1130 OP]] [[#cal-1160|1160]] [[#cal-1161|1161]]</div></div>
-<div class="rp-era"><div class="rp-era-name">Bubbleback / early automatic</div><div class="rp-chips">[[#cal-520|520]] [[#cal-50|50]] [[#cal-620|620]] [[#cal-630|630]] [[#cal-635|635]] [[#cal-105-hunter|700/710]] [[#cal-600|600]] [[#cal-59|59]] [[#cal-a260|A260]] [[#cal-a296|A296]] [[#cal-a295|A.295]] [[#cal-645|645]] [[#cal-740|740]] [[#cal-745|745]]</div></div>
+<div class="rp-era"><div class="rp-era-name">Bubbleback / early automatic</div><div class="rp-chips">[[#cal-520|520]] [[#cal-420|420]] [[#cal-50|50]] [[#cal-620|620]] [[#cal-630|630]] [[#cal-635|635]] [[#cal-105-hunter|700/710]] [[#cal-600|600]] [[#cal-59|59]] [[#cal-a260|A260]] [[#cal-a296|A296]] [[#cal-a295|A.295]] [[#cal-645|645]] [[#cal-740|740]] [[#cal-745|745]]</div></div>
 <div class="rp-era"><div class="rp-era-name">Calendar / moonphase</div><div class="rp-chips">[[#cal-a295-cpl|A.295 CPL]]</div></div>
 <div class="rp-era"><div class="rp-era-name">Early Oyster (lot attribution)</div><div class="rp-chips">[[#cal-2849-note|2849 (Cal. 500 attribution)]]</div></div>
@@ Line 384: / Line 384: @@
 Bubbleback and early Oyster Perpetual references use a distinct family of self-winding calibers. They followed the Prince's manual shaped movements and preceded the standardized post-war automatic line. The "bubble" refers to the domed caseback needed to clear the full-rotor automatic mechanism. It was not a bumper system, although many competing automatics still used one.
+<span id="cal-420"></span>
+=== Cal. 420 ===
+{| class="wikitable" style="width:280px; font-size:90%;"
+! detail
+! value
+|-
+| type / size
+| Automatic centre-seconds; catalogue prints “7¾” and separately lists Ø 19.4 mm
+|-
+| reference attribution
+| Possible ref. [[Reference:5002|5002]] attribution from James Dowling; 5002 catalogue descriptions of subsidiary seconds conflict with Cal. 420’s centre-seconds description
+|}
+Rolex's parts catalogue establishes Cal. 420's type and specifications, but it does not list ref. 5002 as a fitment. James Dowling's reference-specific listing assigns the caliber to a 5002. The seconds-layout mismatch leaves that assignment uncertain; available auction images show no readable movement stamp. Antiquorum describes an 8-ligne movement size in one 5002 catalogue entry. [https://www.clubderelojeria.com/comunicaciones/R/ROLEX/rolex170/rolex%20170.pdf Rolex spare-parts catalogue ref. 170, Cal. 420]; [https://www.ukwatches.com/product/007-rolex-14k-1950s-oyster-perpetual-ladys-bubbleback/ James Dowling, ref. 5002 listing]
 <span id="cal-520"></span>
@@ Line 785: / Line 800: @@
 Antiquorum gives 26 jewels for its Cal. 740 example. That count should be kept with the source's description. A different count in a reference table may reflect a counting convention or a different execution; the number alone does not settle which.
-Antiquorum also assigns Cal. 740 to manual-wind [[Reference:6094|ref. 6094]], usually with 17 jewels. Its 2008 lot labels the case 6094/6294; the 2010 and 2012 lots identify ref. 6094 alone. The 2018 listing for case 882812 calls the watch self-winding in its headline while the specification field gives Cal. 740. Keep these as lot-level attributions: the records do not establish that the 6094 Cal. 740 is the automatic 26-jewel movement documented here for ref. 4467. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-203-530 Antiquorum, lot 530]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-242-134 Antiquorum, lot 134]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-tropical-lot-262-291 Antiquorum, lot 291]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-oysterdate-precision-lot-313-138 Antiquorum, lot 138].
+Antiquorum also assigns Cal. 740 to manual-wind [[Reference:6094|ref. 6094]], usually with 17 jewels. Its 2008 lot labels the case 6094/6294; the 2010 and 2012 lots identify ref. 6094 alone. The 2018 listing for case 882812 calls the watch self-winding in its headline while the specification field gives Cal. 740. Watch-Wiki lists Cal. 740 as an automatic 18-jewel Datejust movement; Antiquorum describes the ref. 4467 Cal. 740 documented here as automatic with 26 jewels. These records use Cal. 740 for different movement descriptions. A separate 6094 photograph shows Rolex and 17 jewels, but no legible caliber stamp; it cannot confirm the auction attribution. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-203-530 Antiquorum, lot 530]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-242-134 Antiquorum, lot 134]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-tropical-lot-262-291 Antiquorum, lot 291]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-6094-oysterdate-precision-lot-313-138 Antiquorum, lot 138]; [https://everywatch.com/rolex/oysterdate-precision/6094/watch-12440774 EveryWatch transcription of Bonhams, lot 85]; [https://www.hashtagwatchco.com/products/1953-rolex-oysterdate-precision-6094-white-red-date-stainless-steel-manual-wristwatch HASHTAGWATCHCO, ref. 6094 listing photographs]; [https://www.watch-wiki.net/doku.php?id=rolex_calibres Watch-Wiki, Rolex calibre index].
 Surviving examples can have replacement movements or parts. A reference launch date should not be assigned automatically to the movement now inside a particular case.
@@ Line 911: / Line 926: @@
 The pallet fork runs in jewels, while the escape wheel has shock-mounted settings and cap jewels on both pivots, matching the treatment of the balance. Indirect centre seconds, driven from the fourth wheel through a friction-sprung pinion, can produce seconds-hand flutter even in a healthy movement. The earliest examples may lack shock protection; Antiquorum's 1946 ref. 4560 description names none.
-Documented fitments include refs. 3745, 4560, 6420, 6422, 6426/6427, 6466, 6480, 6482, 6494, 9083 and 9659. Bonhams also records a ref. 6694 with a III.60 caseback date on Cal. 1210.
+Documented fitments include refs. 3745, 4560, 6420, 6422, 6426/6427, 6466, 6480, 6482, 6494, 9083 and 9659. Bonhams also records a ref. 6694 with a III.60 caseback date on Cal. 1210. Vintage Watch Centre also assigns Cal. 1210 to its ref. 4219, case 056827, but no caliber engraving is visible in the movement photo. The dealer dates the case circa 1948; White's Field Manual lists Cal. 1210 as 1954–1964 on PDF page 91. These conflicting attributions remain tied to that one watch. [[Reference:4219|The 4219 article]] records the discrepancy. [https://www.vintagewatchcentre.com/product/rolex-precision-ref-4219-c1948/ Vintage Watch Centre]; [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual, PDF p. 91].
 <span id="cal-1215"></span>