Your watch's Ref. number is 4118.
You are correct, the movement is Cal. 439/7C and it looks beautiful. I like the design of the curved bridges and swan's neck micro-regulating system.
Based on the movement and case serial numbers, I believe the watch was made in the 1950s. But VC should be able to give you an exact year of production if you provide them with the two serial numbers:
Our leader here on THL, Alex, may be able to get you this information as well.
It's a nice, thin, pocket watch. Congratulations!
Best Regards, Dan
What a beautiful movement it is!
As Dan points, swan neck regulator gives it luxurious feel.