Help with year my VC was created

I just inherited two VCs from my late father, and would like to know the year one of them was created/assembled. I do know it's a Gent's 18K white gold Patrimony Classique with gold bracelet/band. The case number is 496792 and the number on the movement is either 100311 or 1003/1. My watch service specialist wasn't sure if the last two inscriptions were two "1" digits or a slash followed by a 1.

Could you help me? 
03/18/2013 - 23:59
Hello and welcome
03/18/2013 - 23:59
The movement is 1003/1 There is a serial number somewhere else on the movement. You will likely need a loupe or magnifying glass to see it clearly. However, given just the case number, I can narrow it to the late 1950's to mid-1960's JB