Reference:Movements: Difference between revisions

Line 16:

<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:

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]

@@ 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>