Base calibre is a 889 I think with a PC module 440 on top. This is the module that has been developed by IWC in the 80's as far as I know and has also been used by JLC. I actually don't know exactly the production period of these, but this was the series ...
and ran through about 1996 or so. Then the Master Controls took over. Beautiful case. The series also included most of the complications that went into the Master Controls, too, like the A-series Geographique, triple-date, etc. -Dean
Hi Nicolas, do you happen t know in what crown position one would wind the clock ? In most outer position you set the time and by that the date. Is it so that in normal position nothing happens and if you pull just one position you would wind the watch ? ...