Vacheron Constantin

Hi When did the Vacheron Constantin Overseas first make an appearance; i am thinking about buying this 1 ; it is my understanding that this is 1 of the first Vacheron Constantin Overseas ; my question to the group is 2 fold ; 1 does anyone have an opinion...  

and greetings from one Bostonian to another! The Overseas Chronometer model that you show in your photos was introduced in 1994 and had a ten year run before Vacheron Constantin updated the design with the models that you will find in the current catalog....  

What size is it - 37/38mm?

I had one for some time, a quality watch but the size at 34 mm was too small so it was time to move to thing else. I still regret selling it. cheers benio