Seiko 7A38 - by the numbers

Have a couple of this silver gold bracelet. But 2 of them hasn't got the B1171 mark on the upper link. They look the same and has the same dimensions. But wonder why they aren't marked . I sold one of them and the buyer asked me why it wasn't marked. i don't think it's an AM as i haven't seen any AM 7A38-7020 bracelets . And the buckle is the same with japan stamp and everything. 

Will post a photo soon. 

Roger.

The Seiko p/n B1171 bracelet (this applies to either the S stainless or C two-tone version) can have the number stamped on the central joining link - (where it's quite difficult to read) or on the outside of the end link.

This is the bracelets i have. The last one doesn't have the 1171 . But looks the same on the other side? the 3 is way worn . Just there to show the 1171 stamp. 

Roger. Try looking where I said ....

the number stamped on the central joining link - (where it's quite difficult to read)

This is a crop and close-up zoom on your last photo:

Thanks