A little treasure,
from the number inside the watch, I suppose on the caseback, it's probably from 1940 -1945 !
To find out the nearest Authorized Dealer for Vacheron Constantin, you go to their homesite. Here is the link :
vacheron-constantin.com in under points of sale.
Then go to the dealer,
or send the watch, for an estimate,
of what it would cost.
A wonderful piece to keep in thr family, please show us some pics and we can tell you more.
Just klick on the mail symbol at this message,
and answer like an ordinary email, and attach some pics!
Good luck :-)
Doc