zOwie Omega Discussion Forum

Thank you for your infomative help.
My friend and I took it to a professional watch repairshop today that specializes in major Swiss brands. The repairman opened the case back and had a look inside. He also checked the rotor, and put it on something that was connected to a machine where he was able to determine its frequency. He determined that it had a frequency of 21000 v.p.h., and that the watch was in pefect running condition. He also claimed that its Cal. was 2789 instead of 2780 which got us a bit confused. According to one web-site, the cal. 2789 has the date in 2 languages. My friend's watch only has the date in a single language. The problem is that neither my friend nor I had a personal look at the caliber no. My friend got his first information that it was a cal. 2780 from a repairman at the watch store where he bought it.
We tend to believe the first watch repairman, although he was a more jeweller than a watch repairman. Neither did he have any sophisticated electronic watch examining devices.

All the information that we were able to gather so far:

It is a 25 Jewels automatic Incabloc movement, It has 3 hands (hour, minute, seconds) It has rapid day/date change in a single language. The date/date indicators are located at the 6 o'clock position. It oscilates presumably at 21600 v.p.h. and presumably has bi-directional winding. The movement is non-hacking. It is possible to wind the movement by turning the crown.

Would all the above information fit the description of a Cal. 2780 movement? Please accept my apologies for the troublesome questions.

Thanks again for your help in advance,

Common man

: ETA2780

: Has been updated with the ETA2824. The Eta 27**
: came in 2 types 3 Hz (21600) and 4 Hz
: (28800) the Movement was used mainly in the
: late seventies. You may find more info if
: you look for some of the others in the 27
: group (2763, 2784, 2750)

: This movement you will also find in the Rolex
: Tudor of the same time

: Hope this helps

: Richard
: www.westrepairs.co.uk