Hi all you Heuer lovers!
Some weeks ago I 've bought on eBay this Heuer Monza 105.501.

It's not "mint", but the case is in a good state and the dial is perfect.
What I like most is the original (IMHO) leather strap that is very hard to find.

Now, the question is about the buckle that I think is aftermarket.

I've made a research on internet, but I couldn't find any good image of the original buckle. Anyway, I strongly believe that original buckle was black PVD.
Does anyone have a picture of it?
Was it black? Also, was it unsigned or with Heuer logo?

Thanks for any suggestion and for the best watch forum in the world.
Daniele