ID Assistance please...>

I live over on the vintage Omega forum and have very little familiarity with modern Omega watches.
I am over on this forum because my local jeweler has had a co-axial come in from one of his
jewelry customers, she's looking to sell. I'm having difficulty finding this online with the three
registers. Caseback has First Man on the Moon verbiage with a smallish hippocampus with
Speedmaster over it. Can anybody guide me to a modern reference number? Any additional
info on this piece would be greatly appreciated as I'd like to make an offer. The bracelet has
455B endlinks and is too small for my wrist, I'd need additional links. Thanks in advance, Tom.

Thanks, I was suspicious in not being able to find a match online!

Thank you, much appreciated!