Reference:6564: Difference between revisions

The catalogued cases are round Oyster cases with screw backs and screw-down crowns. Reported diameters range from 33mm to 34mm. Christie's gives 34mm for its circa-1956 steel-and-gilt chronometer and 33mm for a circa-1960 9k-gold example; Bonhams gives 33mm for its circa-1955 18k-gold example. The existing yellow-gold photograph represents one material and configuration, not a universal case specification. The reviewed records do not establish one bezel, crown marking, or crystal type for every 6564.

Bracelet details vary by lot. Christie's describes a bracelet on its circa-1956 steel “Deepsea” example, while the Bonhams 18k-gold catalogue entry is shown on a strap. The Hodinkee 18k-gold example is presented with a gold bracelet, but that listing does not by itself prove original delivery. Bracelet and clasp stamps date those components; they do not date the watch head or prove that the components were sold with it.

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