In the catalogues from 1990 thru 1996, there was listed the Ref. 3805 Ingenieur Chrono Alarm. The list price for the SS model was $4995.
There were a number of variations available- SS with SS bracelet with either a white or a black dial, and a mixte version of SS and yellow gold with a gilt dial. I believe there were even some available with precious stones set in the bezel. Also, the Ref. 3815 was the same watch but with a leather strap, and the all gold Ref. 9515.
As was the norm for that time, it was a compact 34mm across and only 9mm high. The engine was a JLC based C. 633 meca quartz- a mechanical chronograph with quartz-controlled step motors. It was waterproof up to 3 bar (30 meters).
The alarm function was controlled by the crown at 11 o'clock, and indicated with the red hand.
This was a 'true' Ingenieur, in that it had a Faraday cage. It has also been said this was one of the famous designer Gerald Genta's designs.
Whatever the case, it is a wonderful example of IWC's history.
