Signed Dial case and movement. 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" doesnt 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.