Reference:precision: Difference between revisions
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Add ref. 3078 evidence and dating guidance |
Clarify ref. 3078 evidence limits |
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Auction catalogues call ref. 3078 either Chronometre or Precision. They describe round manual-wind examples in stainless steel, 9ct gold, and 18ct gold, with subsidiary seconds and reported sizes of 29 or 30 mm. Christie's records 17-jewel movements marked Patented Superbalance and 18-jewel Ultra Prima chronometers; no numbered caliber is established. Its circa-1935 and 1950s dates belong to individual lots, while reported 1937 import marks date case markings. | Auction catalogues call ref. 3078 either Chronometre or Precision. They describe round manual-wind examples in stainless steel, 9ct gold, and 18ct gold, with subsidiary seconds and reported sizes of 29 or 30 mm. Christie's records 17-jewel movements marked Patented Superbalance and 18-jewel Ultra Prima chronometers; no numbered caliber is established. Its circa-1935 and 1950s dates belong to individual lots, while reported 1937 import marks date case markings. These catalogue records leave the factory family label and production span unresolved. [[Reference:3078|The ref. 3078 article]] keeps the examples and their unresolved dates separate. [https://www.christies.com/en/lot/lot-1817451 Christie's, circa-1935 steel example] [https://www.christies.com/en/lot/lot-892250 Christie's, 9ct-gold example] [https://www.christies.com/en/lot/lot-1572832 Christie's, 18ct-gold example] [https://www.davidduggleby.com/auctions/2300/Jewellery-Watches/104955/ David Duggleby, lot 2177] | ||
== Rectangular manual-wind ref. 3140 == | == Rectangular manual-wind ref. 3140 == | ||