Looks like a Ref. 73464, but as said before, there's something not right about the dial.
Yes, if a white 73464, then the blue hour stripes are missing - but there is lume there, meaning that the dial has been touched as a bear minimum... but other areas look 'off'..
The 'Swiss' text is too low, the Heuer shield should start under the A and finish under the A of Autavia. The minute markers look too long. Hour batons missing black central lines.
It's hard to tell from the photo, but it looks like a 11630 case with 1163 acrylic?? no pusher cut outs on the top/side of the case.?

See comparison pic below.. library pic on the left.. ebay version on the right.

and a bone fide genuine dial that Paul G owned..

Stewart
- Heuerville