19+ Omega Speedmaster Professional Sapphire Caseback UK. Dunno if you've come across caseback concepts in your search. Omega speedmaster professional moonwatch sapphire caseback.
The first is the traditional version that uses a stainless steel caseback and a hesalite.
Also, is has a sapphire caseback (but of course will include the moonwatch caseback). Omega speedmaster professional moonwatch on chrono24.ae. Omega moonwatch speedmaster sapphire back steel bracelet 42mm. Omega moonwatch speedmaster sapphire back 42mm crocodile band.