Reference:precision: Difference between revisions

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| [[Reference:3003|3003]] · [[Reference:3004|3004]] || 1937 launch || Manual lever movements; two auction lots describe 10-line, 15- and 17-jewel examples || One catalogued 3003 is 27mm steel/pink gold; one 3004 is 30mm steel || First pair listed under Oyster Precision; documented examples differ in case and seconds layout

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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. The available records do not establish a factory family label or production span. [[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 ==

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 | [[Reference:3003|3003]] · [[Reference:3004|3004]] || 1937 launch || Manual lever movements; two auction lots describe 10-line, 15- and 17-jewel examples || One catalogued 3003 is 27mm steel/pink gold; one 3004 is 30mm steel || First pair listed under Oyster Precision; documented examples differ in case and seconds layout
 |}
+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. The available records do not establish a factory family label or production span. [[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 ==