Interesting watch Jurgen. I don't think it's a Heuer, those registers are more reminiscent of some other manufacturers and I usually expect a brushed finish to the case from Heuer but interesting none the less. Heuer did produce a chrono specifically for football though, as discussed here:

http://www.chronocentric.com/forums/heuer/index.cgi?page=1;md=read;id=29876

and we have seen football specials from other manufacturers like Omega.

It would be interesting to try and hunt down the maker of your UNAF watch but it could be hard work - a LOT of people were using Valjoux 773x movements in hundreds of watch models.