I think that the bezel variant shown by Peter is from Heuer.

In cases like this, I like to use "Occam's Razor" - the simplest theory is most likely to be correct.

Consider the two possibilities:

1) The bezel is an aftermarket fake: A guy decides to make an aftermarket fake SPECIFICALLY for the Diver 100 (I've never seen this bezel on a regular 11063 Autavia). He is enough of an expert to make the bezel insert fit perfectly into the 11063 bezel. He is also obviously a bit of a Heuer expert as he understands that this is a diver model and the 11630P diver model had a special bezel, which he decides to copy, but it never enters his mind to copy the actual Diver 100 bezel.

2) Heuer made a specialist bezel for the Diver 100 which looks really cool and suits the watch but it is not in a catalog. There are many other Heuer variations which are not in a catalog.

I am pretty neutral, because I dont own a Diver 100 (of either variety), but I just find hypothesis (1) too strange to believe, whereas (2) is very easy to believe as we have seen this happen lots of times with Heuer - even catalogs with incorrect pictures.

Anyway, thats my view. If I ever buy a Diver 100, I'd prefer one with the "P" bezel insert....

Shaun