IWC Caliber 7922
|Base Caliber||ETA/Valjoux 7750|
|Power Reserve||44 hours|
|Vibrations Per Hour||28,800|
|Features||Chronograph, day, date|
|Country of Manufacture||Switzerland|
Here is an excerpt of an excellent write-up by G. J. Buhyoff aka Time Flies about IWC’s process of transforming a 7750 to a 7922.
The new c. 7922 utilizes IWC designed and re-engineered barrel and train assemblies as well as a new balance wheel and mainspring, in addition to more extensive finishing of bridges, plates and screws.. So, the basic Valjoux 7750 kit is essentially remade and becomes a 7922… IWC buys a 7750 kit and extensively reworks it, where that reworking is that of a substantive nature.