Look at this discussions

http://chronocentric.com/forums/heuer/index.cgi?md=read;id=38033
http://www.vetroplastica.it/forum/viewtopic.php?t=8638
http://chronocentric.com/forums/heuer/index.cgi?md=read;id=37008

I didn't remember when and where, you told me that you didn't buy this Chronomatic Siffert on ebay for this case!
http://www.onthedash.com/Guide/_Chronographs/62.Autavia/d.Automatic_Autavias/69.Chronomatic_Ref_1163T/53Chronomatic.JPG
I'm gonig to look into the forum and into my mail to find this...

Another important collector told me that my watch is a fake with reprinted numbers!
I discover that he didn't know Autavias as well as he want to...

: I do not remember this . . . but I look at a lot of watches, so
: perhaps I have forgottoen this one.

: I remember that you didn't buy a Chronomatic Siffert on ebay for
: this case!

: I don't know what you are referring to here. There is only one
: Chronomatic Siffert that I can recall seeing on eBay that had
: authenticity issues. In that instance, the Chronomatic dial had
: been placed in a much later case, and the seller acknowledged
: this. So the sale was for a genuine Chronomatic dial being
: displayed in a much later case. This is the only Chronomatic
: listed on eBay that comes to mind. Please tell me if you are
: referring to something else.

: I an OK with the use of nicknames, when they are helpful to
: clarify which model / execution we are discussing. In this case,
: I ask what the "Bullitt case" nickname means, and I
: still do not have a precise answer. Cut front and back? What
: style case-back? What serial number ranges / batch? Used for
: which models -- 1163T or 1163MH or both? Maybe my head is just
: cloudy today, but I am not seeing the "discovery". Of
: course, I have great respect for all the collectors, research,
: history, etc.

: We often see nicknames invented for purposes of marketing, with no
: precision or historical explanation, and then we are stuck with
: the names for a long time. Derek Bell?

: Jeff