Iwc cal 89 movement variation

Hello,

I have recently become a firm admirer of the IWC cal 89 movement and have
studied online different variations.

The aim one day is to find a watch / movement in superb condition for me to
keep.

My dream variation of the IWC cal 89 was the hacking seconds variation, but
today I found a picture online of a iwc cal 89 with a cap jewel over the
escape wheel pivot ( from a archive sheet i have this part is labelled as part
8900.

Is it beyond difficult to find information on this particular movement and
also why this movement was more finished than others?..

Regards

A

I cannot answer your specific questions and nothing looks unusual on your
posted image.

Have you seen this link which might
give you additional information:

http://www.ranfft.de/cgi-bin/bidfun-
db.cgi?10&ranfft&&2uswk&IWC_89

Hi Altchrono,

i was about to write, that Cal. 89 movements with cap jewels on the escape
wheel only appeared in the early 1970s when the production of quite thick
hand wound calibres ceased. Most of that young Cal. 89 model came with
adjustments in at least 3 positions (engraved on the center wheel bridge). But
the movement in your picture dates to 1956 which is quite early. The movement
you show has a classical polished steel plate to hold the cap jewel on the
escape wheel where as the models from the 70s have a Duofix assembly (looks
like a KIF Flektor shock absorber but has no schock resisting function).

When it comes to the hacking feature, as far a s i know this was only used in
Mk 11 Pilots Watches.

The CYN engraving on the Balance cock is the code of the US importer it should
stand for "Clairmont Trading Corp, Prexa Watch Ltd." taht means the movement
was made for exporting to the US.

br

Cromagnonman

Cromagnonman,

Thank you for the reply. That information I can work with.

Regards,

A