Can you show us what markings you're referring to?
It turns out I may be mistaken. On all of my other Apple bands, there is a small "42 mm" or "44 mm" imprint on the underside of the end of the band where it joins the watch. There is no such imprint on the SS bracelet. However, I did find an imprint on the inside of the clasp. I have not compared this to "official" Apple SS bracelets to see if this is where the imprint should normally be located. Does anyone know?