As a footnote to the different cases point that Paul has made, I have found that the case lugs are different depths too, dial to case-back.

I found this out when I tried to put the GF bracelet from my 1163 MH 'Bell' on to my 1163 T 'Siffert'. It wouldn't fit as the Bell case used HLD ends and the Siffert used the slightly deper HLF ends.

David H

: Stewart - in my opinion the watch will be original if all the
: components are original i.e. hands, dial, case, crown &
: pushers and Heuer signed movement. I would say the most valuable
: of these 1163 MH, the so called "Derek Bell" is the
: Chronomatic (obviously) and then the first execution. The rest
: seem to be quite abundant and with the Viceroy promotion, the
: 1163 black dial and white subs with red accents is the most
: common of the 1163 (more so than the Siffert and the Orange
: Boy). Because of that they have many characteristics i.e. V on
: the case, MH or Tachy bezel, steel hands with black stipe and
: hands with red accent. The chronology of the this mode is as
: follows:

: 1. Chronomatic
: 2. Plain steel markers, steel hands, 3,6,9,12 sub register, flat V
: in Autavia, cal 11
: 3. White inset markers, steel hands with black stripe, 3,6,9,12 sub
: register, cal 11 or 11-I
: 4. White inset markers, steel hands with red accents, 1-12 sub
: register, cal 11-I or 12 (Viceroy = Tachy bezel)

: So, as these were produced in large volumes and by Heuer, you can
: expect some mix and match in movement, hands and bezel. One
: further point to note is the case. There were two types of 1163
: cases: the Schmitz case with the pusher housing open top and
: botton and the Piquerez case with closed pusher on the
: bottom/underside of the case. Just thought I would throw that
: one in. There is proof that the Schmitz cases were used on early
: 2nd execution models but are more common on the later models. I
: am not sure which were used for the Viceroy but the example on
: the Autavia page is a Piquerez case (closed one side).
: Hope this helps.

: regards
: Paul
: www.heuerworld.com