Bracelet and End Link Markings

I've looked online at several places to find genuine Omega materials. I've found multiple bracelets of various models and have a question. Do ALL genuine Omega bracelets with attached end links have the number stamped on them? The 1162/172 I just bought doesn't and it was packaged in the exact same packing I've received from an Omega Boutique for a similar bracelet. I've carefully examine the rest of the bracelet and it feels and looks so very close to my worn out bracelet it his hard to imagine. The taper is slightly different.
What do the experts say?

I believe that it looks original and legit. For my personal experience the original bracelet from the 70’s feels a little heavier than the newer versions.

I spoke with the person I bought it from and he was the authorized repair center owner for omega until 2011. He is just selling off all stock. Sorry

Not all have numbers on the end pieces.

The 1162 has been in production in one form or another for like 45 years now, and has had a lot of variation. I don't have any specs documented or a timeline to point to, but going from memory I recall there are variations in:
-end piece width
-link width (taper)
-link sizing method (screws vs pins)
-clasp shape
-clasp dimensions
-clasp logo style
-inner clasp engravings

It was used on many watches over the years, and was sort of the default bracelet for non-Moonwatch sporty Omega watches of the 1970s. And since the 70s, Omega kept making versions of it and I believe they still list it as the correct replacement bracelet for even more vintage pieces that it probably didn't originally go with.

At one point I had around a dozen 1162s at the same time but I never got around to analyzing all the differences. I probably still have 9 or 10, including one in gold plated.