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

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=== Numbered Prince movements (510, 579, 701, 841, 1004, 1130, 1439) ===

Seven numbers circulate as ~~Prince~~ "calibers": 510, 579, 701, 841, 1004, 1130, and 1439. ~~All~~ are most likely movement ~~serial numbers misread as~~ caliber designations, ~~so they are grouped here~~.

Seven numbers circulate in Prince catalogues as "calibers": 510, 579, 701, 841, 1004, 1130, and 1439. In the Prince examples reviewed here, the bare numbers are most likely movement serials rather than caliber designations. This interpretation is specific to the Prince plates; auction catalogues separately identify a Rolex automatic Cal. 1130 in Oyster Perpetual [[Reference:6548|ref. 6548]] examples, discussed below.

Photographed Prince plates carry a grade legend, jewel count, "Swiss Made," and a bare number stamped beside the "NN RUBIES" wording, but no caliber designation. Grade legends include Prima, Extra Prima, Ultra Prima, Observatory Quality, Officially Tested in Eight Ways, Timed 6 Positions, and For All Climates. The bare number ranges from four to seven digits. Ultra Prima 18-jewel examples with otherwise matching plates carry 1260, 1439, and 1759 in that position, confirming that the stamp varies within one movement type.

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Continental auction catalogues identify these movements by size code and grade, such as "cal. T.S. 300" or "7½′′′ T.S. 300, Observatory Quality." UK lots that print a "Cal." figure also give a separate case or serial number, indicating that the supposed caliber was read from the movement. The specifications also overlap: 1439 and 1759 both describe an 18-jewel Ultra Prima movement adjusted to six positions. A bare mainplate serial has likewise appeared in print as a "1240 calibre movement."

Auction descriptions use these numbers, but the available evidence ~~identifies them as~~ movement serials.

Auction descriptions use these numbers, but the available plate evidence points to movement serials.

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

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For [[Reference:2849|ref. 2849]], two Antiquorum catalogues identify 17-jewel Cal. 500 movements in separate watches dated 1937. Antiquorum’s 2006 note also says Cal. 500 was produced from 1943 to 1953, which conflicts with that lot’s own date and attribution. These attributions belong to those catalogue examples; the records do not settle the reference’s movement range. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-216 Antiquorum, case 87,464]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-2849-lot-272-145 Antiquorum, case 36,618].

== Oyster Perpetual automatic movements ==

=== Rolex automatic Cal. 1130 ===

Several auction catalogues identify an automatic Rolex Cal. 1130 in Oyster Perpetual ref. [[Reference:6548|6548]] examples. Dorotheum and Antiquorum describe 26 jewels. This is a separate attribution from the bare 1130 number on the Prince plates above, where the number appears in a movement-serial position and likely records a serial rather than the caliber.

The available sources document the caliber name and jewel count, but do not establish a production interval, beat rate, or full technical specification. Verify the movement marking on the individual watch. [https://www.dorotheum.com/en/l/8560852/ Dorotheum, ref. 6548, circa 1942/43]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-111-145 Antiquorum, ref. 6548, circa 1960]

=== Cal. 1160 ===

The Vintage Rolex Field Manual lists Cal. 1160 on base 1100, with automatic winding, 26 jewels and a rate of 19,800 vph; its table gives 1968. Sotheby's and Cambi catalogue Cal. 1160 in ref. [[Reference:6548|6548]] watches dated circa 1945 and circa 1957. Those lot dates conflict with the Field Manual entry. Its table is not a ref. 6548 fitment record, and the available sources do not resolve whether the discrepancy comes from a lot date or caliber identification. [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual]; [https://www.sothebys.com/en/buy/auction/2025/important-watches-ii/reference-6548-a-stainless-steel-wristwatch-with Sotheby's, lot 8773]; [https://www.cambiaste.com/uk/auction-0841/rolex-precious-oyster-perpetual-watch-ref-6548-in-steel-with-silver-di-286012 Cambi, lot 186]

=== Cal. 1161 ===

The Field Manual lists Cal. 1161 on base 1100, with automatic winding, 26 jewels and 19,800 vph; its table gives 1970. Sotheby's attributes Cal. 1161 to a ref. [[Reference:6548|6548]] dated circa 1964. Bonhams assigns it to a circa-1968 watch catalogued jointly as refs. 6548/6549. These catalogue dates precede the manual's entry; the sources do not establish the 6548 fitment interval or resolve the conflict. [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual]; [https://www.sothebys.com/en/buy/auction/2020/watches-5/rolex-reference-6548-oyster-perpetual-mickey-mouse-2 Sotheby's]; [https://images1.bonhams.com/original?src=Images%2Flive%2F2020-01%2F30%2FS-25954-0-1.pdf Bonhams, lot 161]

== Bubbleback and early automatic ==

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 <div class="rp-index">
 <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">Calendar / moonphase</div><div class="rp-chips">[[#cal-a295-cpl|A.295 CPL]]</div></div>
@@ Line 202: / Line 203: @@
 === Numbered Prince movements (510, 579, 701, 841, 1004, 1130, 1439) ===
-Seven numbers circulate as Prince "calibers": 510, 579, 701, 841, 1004, 1130, and 1439. All are most likely movement serial numbers misread as caliber designations, so they are grouped here.
+Seven numbers circulate in Prince catalogues as "calibers": 510, 579, 701, 841, 1004, 1130, and 1439. In the Prince examples reviewed here, the bare numbers are most likely movement serials rather than caliber designations. This interpretation is specific to the Prince plates; auction catalogues separately identify a Rolex automatic Cal. 1130 in Oyster Perpetual [[Reference:6548|ref. 6548]] examples, discussed below.
 Photographed Prince plates carry a grade legend, jewel count, "Swiss Made," and a bare number stamped beside the "NN RUBIES" wording, but no caliber designation. Grade legends include Prima, Extra Prima, Ultra Prima, Observatory Quality, Officially Tested in Eight Ways, Timed 6 Positions, and For All Climates. The bare number ranges from four to seven digits. Ultra Prima 18-jewel examples with otherwise matching plates carry 1260, 1439, and 1759 in that position, confirming that the stamp varies within one movement type.
@@ Line 208: / Line 209: @@
 Continental auction catalogues identify these movements by size code and grade, such as "cal. T.S. 300" or "7½′′′ T.S. 300, Observatory Quality." UK lots that print a "Cal." figure also give a separate case or serial number, indicating that the supposed caliber was read from the movement. The specifications also overlap: 1439 and 1759 both describe an 18-jewel Ultra Prima movement adjusted to six positions. A bare mainplate serial has likewise appeared in print as a "1240 calibre movement."
-Auction descriptions use these numbers, but the available evidence identifies them as movement serials.
+Auction descriptions use these numbers, but the available plate evidence points to movement serials.
 {| class="wikitable" style="font-size:90%;"
@@ Line 308: / Line 309: @@
 <span id="cal-2849-note"></span>
 For [[Reference:2849|ref. 2849]], two Antiquorum catalogues identify 17-jewel Cal. 500 movements in separate watches dated 1937. Antiquorum’s 2006 note also says Cal. 500 was produced from 1943 to 1953, which conflicts with that lot’s own date and attribution. These attributions belong to those catalogue examples; the records do not settle the reference’s movement range. [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-216 Antiquorum, case 87,464]; [https://catalog.antiquorum.swiss/en/lots/rolex-ref-2849-lot-272-145 Antiquorum, case 36,618].
+== Oyster Perpetual automatic movements ==
+<span id="cal-1130-rolex-automatic"></span>
+=== Rolex automatic Cal. 1130 ===
+Several auction catalogues identify an automatic Rolex Cal. 1130 in Oyster Perpetual ref. [[Reference:6548|6548]] examples. Dorotheum and Antiquorum describe 26 jewels. This is a separate attribution from the bare 1130 number on the Prince plates above, where the number appears in a movement-serial position and likely records a serial rather than the caliber.
+The available sources document the caliber name and jewel count, but do not establish a production interval, beat rate, or full technical specification. Verify the movement marking on the individual watch. [https://www.dorotheum.com/en/l/8560852/ Dorotheum, ref. 6548, circa 1942/43]; [https://catalog.antiquorum.swiss/en/lots/rolex-lot-111-145 Antiquorum, ref. 6548, circa 1960]
+<span id="cal-1160"></span>
+=== Cal. 1160 ===
+The Vintage Rolex Field Manual lists Cal. 1160 on base 1100, with automatic winding, 26 jewels and a rate of 19,800 vph; its table gives 1968. Sotheby's and Cambi catalogue Cal. 1160 in ref. [[Reference:6548|6548]] watches dated circa 1945 and circa 1957. Those lot dates conflict with the Field Manual entry. Its table is not a ref. 6548 fitment record, and the available sources do not resolve whether the discrepancy comes from a lot date or caliber identification. [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual]; [https://www.sothebys.com/en/buy/auction/2025/important-watches-ii/reference-6548-a-stainless-steel-wristwatch-with Sotheby's, lot 8773]; [https://www.cambiaste.com/uk/auction-0841/rolex-precious-oyster-perpetual-watch-ref-6548-in-steel-with-silver-di-286012 Cambi, lot 186]
+<span id="cal-1161"></span>
+=== Cal. 1161 ===
+The Field Manual lists Cal. 1161 on base 1100, with automatic winding, 26 jewels and 19,800 vph; its table gives 1970. Sotheby's attributes Cal. 1161 to a ref. [[Reference:6548|6548]] dated circa 1964. Bonhams assigns it to a circa-1968 watch catalogued jointly as refs. 6548/6549. These catalogue dates precede the manual's entry; the sources do not establish the 6548 fitment interval or resolve the conflict. [https://irp-cdn.multiscreensite.com/0b5fdf83/files/uploaded/1.0%20RolexBook-23Mar.pdf The Vintage Rolex Field Manual]; [https://www.sothebys.com/en/buy/auction/2020/watches-5/rolex-reference-6548-oyster-perpetual-mickey-mouse-2 Sotheby's]; [https://images1.bonhams.com/original?src=Images%2Flive%2F2020-01%2F30%2FS-25954-0-1.pdf Bonhams, lot 161]
 == Bubbleback and early automatic ==