That's the problem, the MK1 dials are impossible to find. In about 7+ months I gave up and bought this one as posted. No, you read that wrong... the dial that came with it was a fake (a terrible one at that) the one I posted is a genuine dial but incorrect for this age of watch which is 61-62. The dial I posted is a MK IV, it would have been a few years later, not much later probably something like 63-64 onwards. Yours could be a MK3 or a MK4.
I can't find a better reference page for these PCGs/dials right now, anyone got one? Tudor collector has some text but its very brief and with no example pics. http://tudorcollector.com/subs/submariner-model-7928/