I thought this was mainly used in engineering/industry, for any operation where timing divisible by 100 makes sense. Of course, Heuer would have been only to happy to sell it to anyone who had a use for it, I don't think there were extensive background checks!

I think I've seen some sales material that refers to it as the "scale for engineers" or some such wording, I'll have to have a dig around the archives.

Now, an Autavia with a pulse bezel is something I've never seen, but as the patent was Heuer's, I guess it wouldn't be an impossibility. They are hard enough to find on Carreras where we do know they existed though. One to add to my list of theoretically possible Heuers perhaps.