: I think the th dating was quickly installed for the visitors
: of the summit, for example the autavia val 92 on the right side
: would be around 1964/65 not 1960.(dauphine hands and smaler sub
: registers).
: The watchmaker told me that the cal 15 was a customer watch in for
: service. We have further done some redating work for the museum
: together with Mathilde, discussing learnings from extensive
: research doing heuer chronographs

: My thoughts would be:
: -Mark is right in dating the watch around early 1972, pusher
: cutouts design of the case would conclude that
: -Heuer had to give orders and numbers for the cases at least a year
: in advance
: -Heuer was working closely with Piquerez, who developed the first
: square case designs water proof systems for the Monaco, you can
: read more about this in the next OM magazine in Italy
: -Due to the planned Viceroy promotion the need for a second Autavia
: case supplier (Schmitz, see Jeffs post)became evident
: -The Schmitz cases had a different case design, the pushers could
: be seen from the front and the back and another unique feature
: was the slightly domed backcase, compare with the Piquerez (
: pushers only visible from the front and different slightly
: flatter caseback.
: -For these Schmitz cases numbering started around 27xxxxx
: -Now we could start to guess, why did heuer use a cal11/12 case for
: a 1563 watch ?
: -Obviously the cal 15 signed cases have not been available at the
: time
: -This specific dial design never appeared in the catalogs
: -I know from time witnesses that the factory used what was
: available, especially after 1972 where nearly all cases were
: signed 1163 V and used for T and MH versions, similar to rolex
: 5512/13 and for example the diver 100 watches later using also V
: signed cases
: -Therefore it would not surprise me if early Schmitz cases where
: used to do a limited run to test this dial design with the
: trade, there are quite a few of these watches appearing recently
: one is on chrono 24 from a german dealer.

: Has somebody seen one of these appearing in the US ?

: I have started working on an extensive Autavia piece, inputs and
: photos of watches very much appreciated..

: Cheers

: Arno

:
: www.heuerchronographs.com