O !
Oh, Stewart !
Cool watch, I like a lot !
I've always liked those ...but somehow never looked or tried hard enough. (I do own a Wittnauer, but not a Chrono.)
I really like it either way - the orig. bezel sure is cool, but the switch to the Autavia's bezel doesn't hurt the look at all. ;-)
And...did you notice? ...
They write Tachometer ... with an O ... that's quite rare, isn't it?
We'd say TACHO(meter) in Germany for what you call speedometer ...
but most Swiss watches would say Tachymeter or ...metre, with a Y, wouldn't they?
May not seem important, OK... but I thought I'd mention it.

Definitely a nice one. And, again, cool pics!
Enjoy it, Stewart,

take care,
Cheers,
Olaf