I add this overview of the Vacheron Constantin 92900 as some may mistake it for a 4072.
There are two known pieces of reference 92900, both created by special order in 1990 with consecutive case numbers (509’768 and 509’679).[1] These pieces were cased in platinum and contain the caliber 295 movement (dating from 1939) found on the early steel Vacheron Constantin 4072.
The 509’768 has been seen at auction on three occasions, in 1994, 2006 and in 2017. This piece has a screwback case and is 35mm in diameter. I have no explanation for the printing on the dial, which neither seems to be of Vacheron quality nor does the style, with greater open space on the dial than I expect to see.
Case 509’768
We know of 509’679 from Christie’s auction notes from 2006 and 2017, but I have not found images or public sale of this piece. This piece differs from the above referenced 509’768 in that it has a silvered dial and applied baton indices, with Roman numerals.
It is unclear to me whether this watch was created by Les Collectionneurs (or the predecessor). No additional information is available from Vacheron Constantin.
[1] Christie’s, Rare Watches, Geneva, 13 November 2017, Lot 116: Vacheron Constantin. An extremely fine and unique platinum chronograph wristwatch with two-tone silvered dial with black hard enamel baton and Arabic numerals