Hi D,
Thats not really quite true. There have been long discussions about this on here and VRF and some 93150s and 93160s have come with round top 3s also my gen service issued 93160 bracelet has a round top 3 on it. I am not too sure about the 78360s.
Furthermore the marking on Z's bracelet is a completely different number to 78360
I met Minh on Sunday at his shop in Saigon. I was there for the weekend. Nice gentleman. We went through some of the parts that he had available and some nice builds that he had. I was impressed and bought a few things from him.
Anyway the best way to contact him will be through his website.
vintagewatchesmq.com