I am being offered a Vacheron Constantin ref 6038 cal P1019/1 with serial #364708 and movement #536479. The back case has the word "Jubilee" stamped. The owner is saying that his watch is the limited edition 200 years anniversary model but I don't see anything on the watch that would prove that if came out in 1955. I have read on the internet that the Jubilee model was sold until 1958 but I have not seen any information on the web on how to identify the anniversary model. Can anyone please help? Thanks.

Pictures of the watch