Adding another piece to my PloProf puzzle

My dad paid me a visit yesterday and brought me a small gift.

A little over a year ago he gifted me his old PloProf 600, you can read the full story here-
https://omegaforums.net/threads/new-member-old-watch.87128/#post-1128707

But yesterday he added another piece to the puzzle, he was moving around some boxes in his garage and came across this rubber extension to the mesh bracelet-


It was used by divers to extend the bracelet when wearing the watch during dive missions that required a thick diving suit.

Here it is when attached to the bracelet-


Unfortunately the rubber extension is a little torn-

Great story and addition. Is the extension to omega signed/stamped?

Thanks!
It is a genuine Omega part Ref 1247-1266/02

Omega PloProf could be the Mars exploration wristwatch... dust proof and radiation proof...