Reference:Movements: Difference between revisions

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The Cal. 300 examples described here have no identified shock-protection system. Incabloc dates the start of its production to 1933 and the later lyre-spring design to 1938. Those dates alone cannot establish the fittings in a particular Prince.

Several UK auction catalogues treat the three- and four-digit numbers found on movements in refs 1862, 1490, and 1855 as calibers. The documented numbers are 510, 579, 841, 1004, 1130, and 1439, with weaker evidence for 701 and a single record of 1759. They are almost certainly movement serials read from the plate. Continental catalogues identify the same movement class by grade and the T.S. size code instead. Cal. 414 and Cal. 527 have no documented connection to the Rolex Prince. The number 971A is a Prince case reference, not an established caliber designation; Antiquorum catalogued that reference in 1989 with a T.S./300-family movement. Fabsuisse labels the movement in its separate ref. 3937 dealer listing “Cal. 971A,” but the auction records reviewed here do not confirm that designation. Treat it as an unverified dealer attribution unless a readable movement marking supports it.

Several UK auction catalogues treat the three- and four-digit numbers found on movements in refs 1862, 1490, and 1855 as calibers. The documented numbers are 510, 579, 841, 1004, 1130, and 1439, with weaker evidence for 701 and a single record of 1759. They are almost certainly movement serials read from the plate. A 2024 Alexandre Landre listing of ref. 1855 calls another movement “Rolex 318”; its lot photographs do not show a readable marking, so this remains an unverified catalogue label. Continental catalogues identify the same movement class by grade and the T.S. size code instead. Cal. 414 and Cal. 527 have no documented connection to the Rolex Prince. The number 971A is a Prince case reference, not an established caliber designation; Antiquorum catalogued that reference in 1989 with a T.S./300-family movement. Fabsuisse labels the movement in its separate ref. 3937 dealer listing “Cal. 971A,” but the auction records reviewed here do not confirm that designation. Treat it as an unverified dealer attribution unless a readable movement marking supports it.

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| 510

| Prince Brancard ref. 1855, serial 143**, circa 1930

| Prince Brancard ref. 1855, case 14368 (Bonhams photograph); Christie’s separately identifies case 14382, circa 1930

| "17-jewel Cal.510 manual wind movement tested to 8 positions"

| 8-~~position adjustment~~, ~~against the more typical 6~~

| Bonhams photograph shows 510 and 17 Rubies on case 14368; a separate Alexandre Landre listing calls another ref. 1855 movement Rolex 318, without a readable mark. [https://www.alexandrelandre.com/lot/148418/25180425-rolex-prince-ref-1855-montre-bracelet-en-acier-et-deux Alexandre Landre, lot 30]

|-

| 579

@@ Line 119: / Line 119: @@
 The Cal. 300 examples described here have no identified shock-protection system. Incabloc dates the start of its production to 1933 and the later lyre-spring design to 1938. Those dates alone cannot establish the fittings in a particular Prince.
-Several UK auction catalogues treat the three- and four-digit numbers found on movements in refs 1862, 1490, and 1855 as calibers. The documented numbers are 510, 579, 841, 1004, 1130, and 1439, with weaker evidence for 701 and a single record of 1759. They are almost certainly movement serials read from the plate. Continental catalogues identify the same movement class by grade and the T.S. size code instead. Cal. 414 and Cal. 527 have no documented connection to the Rolex Prince. The number 971A is a Prince case reference, not an established caliber designation; Antiquorum catalogued that reference in 1989 with a T.S./300-family movement. Fabsuisse labels the movement in its separate ref. 3937 dealer listing “Cal. 971A,” but the auction records reviewed here do not confirm that designation. Treat it as an unverified dealer attribution unless a readable movement marking supports it.
+Several UK auction catalogues treat the three- and four-digit numbers found on movements in refs 1862, 1490, and 1855 as calibers. The documented numbers are 510, 579, 841, 1004, 1130, and 1439, with weaker evidence for 701 and a single record of 1759. They are almost certainly movement serials read from the plate. A 2024 Alexandre Landre listing of ref. 1855 calls another movement “Rolex 318”; its lot photographs do not show a readable marking, so this remains an unverified catalogue label. Continental catalogues identify the same movement class by grade and the T.S. size code instead. Cal. 414 and Cal. 527 have no documented connection to the Rolex Prince. The number 971A is a Prince case reference, not an established caliber designation; Antiquorum catalogued that reference in 1989 with a T.S./300-family movement. Fabsuisse labels the movement in its separate ref. 3937 dealer listing “Cal. 971A,” but the auction records reviewed here do not confirm that designation. Treat it as an unverified dealer attribution unless a readable movement marking supports it.
 <span id="cal-300-ts"></span>
@@ Line 225: / Line 225: @@
 |-
 | 510
-| Prince Brancard ref. 1855, serial 143**, circa 1930
+| Prince Brancard ref. 1855, case 14368 (Bonhams photograph); Christie’s separately identifies case 14382, circa 1930
 | "17-jewel Cal.510 manual wind movement tested to 8 positions"
-| 8-position adjustment, against the more typical 6
+| Bonhams photograph shows 510 and 17 Rubies on case 14368; a separate Alexandre Landre listing calls another ref. 1855 movement Rolex 318, without a readable mark. [https://www.alexandrelandre.com/lot/148418/25180425-rolex-prince-ref-1855-montre-bracelet-en-acier-et-deux Alexandre Landre, lot 30]
 |-
 | 579