Not too much, you could always have the tritium removed and replace with a non glow substitute, or look for tritium hands for sale.
I had the luminova on the hands of a 70's Speedmaster replaced by radium---my watchmaker has an old stash. The radium is a good color match AND a good glow match to the tritium hour markers.
Best bet is eBay. Same hands from 1969 through 98/99 at the luminova switch.
Sometimes called 145.022 hands.
I suppose the hands were replaced during service by the owner. Does Omega typically do this as part of service or was it an independent watch shop? http://speedmaster101.com/blog/superluminova-vs-tritium/
My guess independent shop. Omega would have most likely replaced the dial also. Dial is consistent with @1990-98. I.e. Type C5 Fat "S"short "r"