Omega

Hi -calling all experts
I have recently seen this watch for sale but would like to know a bit about all the 3 generation and what makes each unique.
Are they collectable?
Here is a pic of the watch



Sorry its a bit small
Thanks in advance
Julian

. . . a  cal 911 outfitted with cadmium-yellow hands.  The later cal 911's differed from the original cal 910's by having a constantly running small seconds hand instead of the 24 hour subdial.   The cadmium-yellow hands were fitted on special order for their additional visibility in a darkened cockpit; my understanding is that most Flightmasters have the standard issue orange hands.  It's one of my all-time favorite watches, and I only held off bidding on Omegamania lot #267 because I was in the middle of escrow and didn't know if I'd be able to spare the cash.   Cordially,  Art