Now, before I congratulate you...
1. We need a pair shot together with JFK!
2. Since you didn't show us, I assume you watch is not complete.
Question now is, which buckle is correct?
The Zenith logo used on the crown of your watch is after the "Star" but before the "Square".
Not sure if Zenith ever did buckles with the type of "Star" as on your crown...
I suspect both left and right buckle would work here...!
Even the one in the middle would be better than what you have right now!
You must always be prepared to complete any watch you may fall on...!
Congratulation, my friend!
Best
Blomman