Hi, i need your help. I have 2 women VC watches from 1950-1960, where there are 2 marks on the back of the case. The first one is the eagle (French 18 K gold), the second one has the same format and size and is like this (if i represent the Malte cross by a "+" symbol) : <D+T>. Why this mark ?. What D and T letters mean ??. Any idea ?. Thanks a lot. Patrice.