I'm sure I've seen some cal.11/12/15 exhibition backs before, maybe some on Abel's photostream??? Great idea anyway, I'd love to see some of my movements behaviours ;-)

: I have just cracked open my watch for the first time and the
: movement is mesmerising!

: I have a Panerai with a glass caseback so I can see the workings
: but the autavia is obviously far more complex and interesting.

: How did they manufacture the components back in the 60/70's? I
: appreciate the technology was not necessarily new at this point
: in pocket/wristwatch manufacturing.But prior to computer design
: and the micro technology available today how were these parts
: made- and so accurately?