Hi there,
Really nice watch.
I don't know Omegas specifically but this is a design from the 1920s.
Could not tell you its value.
The strap has nothing to do with the value of the watch, unless the strap came originally with the watch in which case you should keep it and not damage it.
The strap might also have some value if it is an Omega branded strap.
Otherwise you should use whatever strap you please, whether it's this one or another.
Hard to say more without any pictures.
Best regards,
S
Edt- PS this doesn't look like a converted pocket watch at all to me.
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