Hi forum, tried searching on this topic but couldn’t find much information. Whet would be the correct buckle for a vintage Zenith captain?

Have some pictures from eBay and also the watches I am referring to.

Many thanks.

Regards.

 

The first ones that you show are for later models. This style would be ideal:

 

That's great, do you know any reputable places that can sell buckles like this?

 

I have seen them sold through some dealers, but they are not common, and you would need to search the 'net regularly to find one. They are very nice buckles, though not cheap/

 

Thank you @Tony C. for the advice! Very helpful as always.