Very interesting discussion. Besides the serial numbers, Arno makes mention of some important details that are specific to the 1163 Chronomatic case and movement. I am struggling to differentiate between Rich's example and Jeff's example when it comes to the cut out for the pushers. The pushers themselves also seem to be similar in that they protrude more than the later examples. It would be great if Arno could be more specific about these unique case features.

The movement is also of interest. The auction example has an unusual stippled mounting plate (not sure if this is the correct name) and I do not recall ever seeing another like it. Maybe the Chronomatic owners can advise if there movements are the same.

I look forward to the replies.
Regards
Paul
www.heuerworld.com