Hello Heuerfans, don't get fooled, attached are pics showing the difference between the vintage straps/buckle and the new ones.Vintage has the little sun on the backside easy noticeable. Vintage strap is more shiny and has a larger sleeve.
Think there are few more tiny differences between the two original Heuer/ Tag Heuer straps shown in the pics below.
There are quite a lot of reproductions out on the bay which are partly thinner leather and buckle are loosing plating rather quickly.
Hope this helps
Cheers
Arno
www.heuerchronographs.com