Contemporarily correct leather strap Seamaster de Ville 136.020

Hey guys,

I have an Omega Seamaster de Ville 136.020, gold-plated:



Now I am looking for a contemporary leather strap, as close as possible to those on which the watch was originally delivered in the 60s.

Unfortunately in Omega's online catalogue there are only black and white pictures from which I can't really get a clue what the original straps must have looked like.

https://www.omegawatches.com/de-de/watch-omega-seamaster-de-ville-omega-cd-136-0020

Does anyone have a clue what the straps looked like from factory? Pictures would be appreciated!

Best regards
79