anon438
429
hi student
Oct 20, 2019,04:32 AM
Because of the CR it could be sayed probably both center second and sub-second have the same ref number and it should be the ref 4907.
You can read the explenation on the 4838 vs. 4907 topic at Antiquorum
link
"...The present lot is an excellent Ref. 4907 comes with the Extract from
the Archive from Vacheron Constantin. What brings to our attention is
that, in this example, the model number engraved on caseback "4838"
doesn't match with its own model number, which should be "4907". And to
the best of our knowledge, only certain number of this reference, mostly
produced during its launch year 1953, were equipped with this "4838"
caseback by "error". And all examples produced after 1954 were equipped
with the right caseback..."
The ref number usually refer to changes of the case and for the CR we know it is the inscribtion CHRONOMETRE ROYAL on the back (at least).
Both ref 4838 and 4907 uses the 35 mm case and the size fits all of the movements (cal. 453, 454, 1007, 1008).
Therefore you would also know the the stadard ref 4838 equiped with 453 sub-second or 454 center second would probably existed as well.
The Cloisonne dial watch is a sample of it what you can conclude if you look for her movement.
The explenation that the difference between ref 4838 (35 mm) and 4724 (37 mm?) is the difference in diameter, would correctly discribe a case modification and therefore conclude a different ref number. But I've seen already Guilloché dials in 35 mm case called 4724. Did you measure yours watch diameter already?