I have up for sale a brand new Bellini Alligator Strap for the Omega Deployant Clasp. This strap measures 20mm on the lug side and 18mm on the clasp end, and would fit the standard Omega 18mm deployant / deployment clasps (e.g. 94521813, 94521833).
Bought it a few months ago but don't think I will be using it since I have since sold the watch it was intended for.
This strap would look great on your Speedy, Aqua Terra or Planet Ocean!
I am asking for RM245 firm.