Reference:Movements: Difference between revisions

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The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, HODINKEE, and 1stDibs; Tajan describes an automatic movement but names no caliber. Bonhams and Adams report 25 jewels; 1stDibs lists 26. Watch-Wiki’s caliber index and Time Connection’s case-parts table also list Cal. 1570 for the 1022. The lists name Cal. 1570, while the five inspected 1022 sale/dealer examples identify Cal. 1560.

Gardiner Houlgate catalogues Cal. 1560 in one ref. 1023, serial 1136xxx, dated circa 1964. Time Connection II’s replacement-parts table lists both Cal. 1560 and 1570 under the reference, without dates or a sequence. The auction record documents one Cal. 1560 example; it does not establish when either caliber entered production.

Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970. Antiquorum lists Cal. 1560 in a ref. 1011 dated 1960, case 546423, and in two lots jointly catalogued as refs. 1010/1011, dated 1960 and 1962. Heritage also lists Cal. 1560 in an undated ref. 1011 sold in 2012. Heritage and Bonhams list Cal. 1560 in individual ref. 1010 lots dated circa 1962 and circa 1967; Antiquorum lists Cal. 1570 in an individual ref. 1010 circa 1968. The Field Manual lists Cal. 1560 for ref. 1010. A 1stDibs item text also names Cal. 1560 for its claimed 1010, though the page title says 1011; treat it as seller-level evidence. These records document both attributions for ref. 1010, and its changeover year remains open; see [[Reference:1010|ref. 1010]]. Antiquorum also catalogues Cal. 1560 in a 1963 ref. 1501, case 953,774; see [[Reference:1501|ref. 1501]] and [https://catalog.antiquorum.swiss/en/lots/rolex-lot-247-67 the lot record].

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Cal. 1570 is the 19,800-vph revision of the 1560, introduced in 1965. Christie’s identifies Cal. 1570 in ref. 1011 case 692498, dated circa 1962; its lot chronology overlaps the ref. 1011 Cal. 1560 examples and does not establish a changeover. See [[Reference:1011|ref. 1011]]. One Artcurial ref. 1005 lot is catalogued with Cal. 1550, despite a chronometer-dial description; other 1005 catalogues list 1560 or 1570. This single lot does not establish a 1005 movement variant or resolve whether the movement is original. It retains the free-sprung Breguet overcoil and Microstella regulation, with adjustment to temperature and five positions. Family-wide bridge engraving causes date movements such as the 1575 in a ref. 1665 to appear marked 1570; the engraving alone does not identify the exact caliber. Phillips identifies Cal. 1570 in a circa-1985 ref. 1024, while Dorotheum lists it on a circa-1965/70 example; those ref. 1024 dates overlap its Cal. 1560 records. Christie’s, Antiquorum, Phillips, Dorotheum and Bonhams also catalogue Cal. 1570 in ref. 1501 examples; see [[Reference:1501|ref. 1501]]. These lot labels do not establish a 1501 changeover year.

Waddington’s lists Cal. 1570 in ref. 1023/8B and dates it circa 1964. ~~Watch-Wiki lists~~ Cal. 1570 ~~for ref. 1022 over 1965–1974, while~~ Pergola’s unofficial chart places serial 902827 in 1962~~. These estimates leave the Waddington’s date uncertain and do not establish early 1023 fitment~~. Hess and Watch.de ~~list~~ Cal. 1570 on other 1023 ~~examples~~, and a 2022 Rolex Forums photograph shows a rotor marked 1570 inside an outer case stamped 1023. ~~The~~ records document individual ~~examples~~, not a first ~~caliber~~ or changeover; see [[Reference:1023|1023]].

Waddington’s lists Cal. 1570 in ref. 1023/8B and dates it circa 1964. That estimate predates the 1965 start date used here for Cal. 1570; Pergola’s unofficial chart places serial 902827 in 1962. Hess and Watch.de identify Cal. 1570 on other 1023 listings, and a 2022 Rolex Forums photograph shows a rotor marked 1570 inside an outer case stamped 1023. Kaplans also lists Cal. 1570 for serial 2,186,841; Watch.de masks its serial as 2186xxx, and their other matching details suggest a repeat listing. These records document the caliber on individual watches, but they do not establish first fitment or a changeover; see [[Reference:1023|1023]].

The balance has four Microstella screws in two opposing pairs, not two. Rolex required equal adjustment within each pair to preserve poise. The larger pair changes rate by about two seconds per day and the smaller by about one. On this family the screws sit in the balance rim; the later 3135 platform moves its Microstella nuts to the inner rim.

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* [https://archive.watch.de/archive_english/rolex-oyster-perpetual-rindengravur-18kt-gelbgold-automatik-armband-leder-34mm-ref-1023-vintage-bj-1969-box-beschreibung-wie-neu-mit-zertifikat-uber-11-900.html Watch.de archive, ref. 1023, Cal. 1570]

* [https://www.rolexforums.com/showthread.php?t=856109 Rolex Forums, 2022 ref. 1023 listing and movement photograph]

* [https://www.the-saleroom.com/de-de/auction-catalogues/gardiner-houlgate/catalogue-id-srgard10204/pdfexport Gardiner Houlgate, 20 May 2025, lot 73, ref. 1023, Cal. 1560]

* [https://www.kaplans.se/en/auktioner/3967?p=2 Kaplans Auktioner, 2 October 2021, ref. 1023 serial 2186841, Cal. 1570]

* [https://www.timeconnectioninc.com/pages/rolex-case-reference-list-1000-thru-1873 Time Connection II, ref. 1023 replacement-parts row]

* [https://www.christies.com/lot/rolex-a-rare-stainless-steel-automatic-wristwatch-6139178/?intObjectID=6139178&lid=1 Christie’s, ref. 6556, case 138'822, Cal. 1040]

* [https://www.hodinkee.com/articles/the-restoration-of-a-rolex-tru-beat-caliber-1040-reference-6556 Aaron Berlow, Cal. 1040 restoration, Hodinkee, 2015]

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 The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, HODINKEE, and 1stDibs; Tajan describes an automatic movement but names no caliber. Bonhams and Adams report 25 jewels; 1stDibs lists 26. Watch-Wiki’s caliber index and Time Connection’s case-parts table also list Cal. 1570 for the 1022. The lists name Cal. 1570, while the five inspected 1022 sale/dealer examples identify Cal. 1560.
+Gardiner Houlgate catalogues Cal. 1560 in one ref. 1023, serial 1136xxx, dated circa 1964. Time Connection II’s replacement-parts table lists both Cal. 1560 and 1570 under the reference, without dates or a sequence. The auction record documents one Cal. 1560 example; it does not establish when either caliber entered production.
 Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970. Antiquorum lists Cal. 1560 in a ref. 1011 dated 1960, case 546423, and in two lots jointly catalogued as refs. 1010/1011, dated 1960 and 1962. Heritage also lists Cal. 1560 in an undated ref. 1011 sold in 2012. Heritage and Bonhams list Cal. 1560 in individual ref. 1010 lots dated circa 1962 and circa 1967; Antiquorum lists Cal. 1570 in an individual ref. 1010 circa 1968. The Field Manual lists Cal. 1560 for ref. 1010. A 1stDibs item text also names Cal. 1560 for its claimed 1010, though the page title says 1011; treat it as seller-level evidence. These records document both attributions for ref. 1010, and its changeover year remains open; see [[Reference:1010|ref. 1010]]. Antiquorum also catalogues Cal. 1560 in a 1963 ref. 1501, case 953,774; see [[Reference:1501|ref. 1501]] and [https://catalog.antiquorum.swiss/en/lots/rolex-lot-247-67 the lot record].
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 Cal. 1570 is the 19,800-vph revision of the 1560, introduced in 1965. Christie’s identifies Cal. 1570 in ref. 1011 case 692498, dated circa 1962; its lot chronology overlaps the ref. 1011 Cal. 1560 examples and does not establish a changeover. See [[Reference:1011|ref. 1011]]. One Artcurial ref. 1005 lot is catalogued with Cal. 1550, despite a chronometer-dial description; other 1005 catalogues list 1560 or 1570. This single lot does not establish a 1005 movement variant or resolve whether the movement is original. It retains the free-sprung Breguet overcoil and Microstella regulation, with adjustment to temperature and five positions. Family-wide bridge engraving causes date movements such as the 1575 in a ref. 1665 to appear marked 1570; the engraving alone does not identify the exact caliber. Phillips identifies Cal. 1570 in a circa-1985 ref. 1024, while Dorotheum lists it on a circa-1965/70 example; those ref. 1024 dates overlap its Cal. 1560 records. Christie’s, Antiquorum, Phillips, Dorotheum and Bonhams also catalogue Cal. 1570 in ref. 1501 examples; see [[Reference:1501|ref. 1501]]. These lot labels do not establish a 1501 changeover year.
-Waddington’s lists Cal. 1570 in ref. 1023/8B and dates it circa 1964. Watch-Wiki lists Cal. 1570 for ref. 1022 over 1965–1974, while Pergola’s unofficial chart places serial 902827 in 1962. These estimates leave the Waddington’s date uncertain and do not establish early 1023 fitment. Hess and Watch.de list Cal. 1570 on other 1023 examples, and a 2022 Rolex Forums photograph shows a rotor marked 1570 inside an outer case stamped 1023. The records document individual examples, not a first caliber or changeover; see [[Reference:1023|1023]].
+Waddington’s lists Cal. 1570 in ref. 1023/8B and dates it circa 1964. That estimate predates the 1965 start date used here for Cal. 1570; Pergola’s unofficial chart places serial 902827 in 1962. Hess and Watch.de identify Cal. 1570 on other 1023 listings, and a 2022 Rolex Forums photograph shows a rotor marked 1570 inside an outer case stamped 1023. Kaplans also lists Cal. 1570 for serial 2,186,841; Watch.de masks its serial as 2186xxx, and their other matching details suggest a repeat listing. These records document the caliber on individual watches, but they do not establish first fitment or a changeover; see [[Reference:1023|1023]].
 The balance has four Microstella screws in two opposing pairs, not two. Rolex required equal adjustment within each pair to preserve poise. The larger pair changes rate by about two seconds per day and the smaller by about one. On this family the screws sit in the balance rim; the later 3135 platform moves its Microstella nuts to the inner rim.
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 * [https://archive.watch.de/archive_english/rolex-oyster-perpetual-rindengravur-18kt-gelbgold-automatik-armband-leder-34mm-ref-1023-vintage-bj-1969-box-beschreibung-wie-neu-mit-zertifikat-uber-11-900.html Watch.de archive, ref. 1023, Cal. 1570]
 * [https://www.rolexforums.com/showthread.php?t=856109 Rolex Forums, 2022 ref. 1023 listing and movement photograph]
+* [https://www.the-saleroom.com/de-de/auction-catalogues/gardiner-houlgate/catalogue-id-srgard10204/pdfexport Gardiner Houlgate, 20 May 2025, lot 73, ref. 1023, Cal. 1560]
+* [https://www.kaplans.se/en/auktioner/3967?p=2 Kaplans Auktioner, 2 October 2021, ref. 1023 serial 2186841, Cal. 1570]
+* [https://www.timeconnectioninc.com/pages/rolex-case-reference-list-1000-thru-1873 Time Connection II, ref. 1023 replacement-parts row]
 * [https://www.christies.com/lot/rolex-a-rare-stainless-steel-automatic-wristwatch-6139178/?intObjectID=6139178&lid=1 Christie’s, ref. 6556, case 138'822, Cal. 1040]
 * [https://www.hodinkee.com/articles/the-restoration-of-a-rolex-tru-beat-caliber-1040-reference-6556 Aaron Berlow, Cal. 1040 restoration, Hodinkee, 2015]