Hello Patek lovers!
I just picked this up from a Japanese seller on ebay... I love this retro-mod early 70's vibe, and it's great on my small wrist.
Sadly, it did not come with the ellipse buckle or original band. Can you tell me what is the proper size of the buckle for this era? I saw an ellipse white gold buckle online which is 11mm... but that seems too small?

I am looking to put this on a cognac color croc band, or order an abp in shagreen in blue to match dial. Your thoughts?