Hi Tom,
That's a great watch & one of my favourite Omegas of all time.
I see you swapped the pushers & by the look of one of your pics, you swapped "single dimple" pushers for the "split pushers".
I have yet to see any Info or even a conversation on this subject, but I reckon the pushers that WERE on your watch are original. I reckon Omega had different colours for the red or yellow chrono hands, then some bright spark had the idea of using common "split pushers" with BOTH colours on them.
I have only ever seen pushers with the "single dimple" on very early 910 flightmasters.
If you ever want to seel your box, gimme a shout ;-)
Steve