Reference:Movements: Difference between revisions

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Cal. 1560 arrived in 1959 as the chronometer-grade 15xx movement, with a free-sprung balance adjusted to temperature and five positions. Auction catalogues give both 25 and 26 jewels without establishing a pattern. Antiquorum usually describes a Breguet overcoil; its flat-hairspring description for one ref. 1502/1503 is an outlier. The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, and HODINKEE; Tajan describes an automatic movement but names no caliber. Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970.

Cal. 1560 arrived in 1959 as the chronometer-grade 15xx movement, with a free-sprung balance adjusted to temperature and five positions. Auction catalogues give both 25 and 26 jewels without establishing a pattern. Antiquorum usually describes a Breguet overcoil; its flat-hairspring description for one ref. 1502/1503 is an outlier. The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, and HODINKEE; Tajan describes an automatic movement but names no caliber. Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970. Antiquorum lists Cal. 1560 in two lots catalogued jointly as refs. 1010/1011, dated 1960 and 1962. 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. These records document both attributions; the changeover year remains open. See [[Reference:1010|ref. 1010]].

Cal. 1560 uses free-sprung Microstella regulation; Cal. 1530 uses an index. Watches made from 1959 to 1965 were tested by the Bureaux Officiels de Contrôle de la Marche des Montres, usually under collective certificates and to a standard around −1/+10 seconds per day in five positions. COSC did not exist until September 1973, so describing an early 1560 as COSC-certified is anachronistic.

Line 2,955:

* [https://www.dorotheum.com/de/l/5280014/ Dorotheum, ref. 1024, 2018, Cal. 1570]

* [https://www.phillips.com/detail/rolex/HK080121/904 Phillips, ref. 1024, 2021, Cal. 1570]

* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-22 Antiquorum, ref. 1010/1011, 1960, Cal. 1560, case 576171]

* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-213-465 Antiquorum, ref. 1010/1011, 1962, Cal. 1560, case 933961]

* [https://jewelry.ha.com/itm/timepieces/wristwatch/rolex-ref-1010-vintage-gold-oyster-perpetual-original-box-and-papers-circa-1962/a/5049-60215.s Heritage Auctions, ref. 1010, circa 1962, Cal. 1560, case 646320]

* [https://images3.bonhams.com/original?src=Images%2Flive%2F2015-04%2F23%2FS-22886-0-1.pdf Bonhams, ref. 1010, circa 1967, Cal. 1560, case 1659430]

* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-1010-oyster-perpetual-lot-334-19 Antiquorum, ref. 1010, circa 1968, Cal. 1570, case 1,960,000]

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-Cal. 1560 arrived in 1959 as the chronometer-grade 15xx movement, with a free-sprung balance adjusted to temperature and five positions. Auction catalogues give both 25 and 26 jewels without establishing a pattern. Antiquorum usually describes a Breguet overcoil; its flat-hairspring description for one ref. 1502/1503 is an outlier. The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, and HODINKEE; Tajan describes an automatic movement but names no caliber. Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970.
+Cal. 1560 arrived in 1959 as the chronometer-grade 15xx movement, with a free-sprung balance adjusted to temperature and five positions. Auction catalogues give both 25 and 26 jewels without establishing a pattern. Antiquorum usually describes a Breguet overcoil; its flat-hairspring description for one ref. 1502/1503 is an outlier. The Oyster Perpetual ref. 1022 is documented with Cal. 1560 by Bonhams, Pandolfini, Adams, and HODINKEE; Tajan describes an automatic movement but names no caliber. Auction catalogues also identify Cal. 1560 in ref. 1024 examples dated circa 1965/66 and circa 1970. Antiquorum lists Cal. 1560 in two lots catalogued jointly as refs. 1010/1011, dated 1960 and 1962. 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. These records document both attributions; the changeover year remains open. See [[Reference:1010|ref. 1010]].
 Cal. 1560 uses free-sprung Microstella regulation; Cal. 1530 uses an index. Watches made from 1959 to 1965 were tested by the Bureaux Officiels de Contrôle de la Marche des Montres, usually under collective certificates and to a standard around −1/+10 seconds per day in five positions. COSC did not exist until September 1973, so describing an early 1560 as COSC-certified is anachronistic.
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 * [https://www.dorotheum.com/de/l/5280014/ Dorotheum, ref. 1024, 2018, Cal. 1570]
 * [https://www.phillips.com/detail/rolex/HK080121/904 Phillips, ref. 1024, 2021, Cal. 1570]
+* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-108-22 Antiquorum, ref. 1010/1011, 1960, Cal. 1560, case 576171]
+* [https://catalog.antiquorum.swiss/en/lots/rolex-lot-213-465 Antiquorum, ref. 1010/1011, 1962, Cal. 1560, case 933961]
+* [https://jewelry.ha.com/itm/timepieces/wristwatch/rolex-ref-1010-vintage-gold-oyster-perpetual-original-box-and-papers-circa-1962/a/5049-60215.s Heritage Auctions, ref. 1010, circa 1962, Cal. 1560, case 646320]
+* [https://images3.bonhams.com/original?src=Images%2Flive%2F2015-04%2F23%2FS-22886-0-1.pdf Bonhams, ref. 1010, circa 1967, Cal. 1560, case 1659430]
+* [https://catalog.antiquorum.swiss/en/lots/rolex-ref-1010-oyster-perpetual-lot-334-19 Antiquorum, ref. 1010, circa 1968, Cal. 1570, case 1,960,000]