What is the difference between Omega 1164 and Omega 1120?

** The OMEGA 1164 replaced the OMEGA 1154 in 1992. The 1164 is essentially the same movement, merely with cosmetic changes to ‘personalize’ it with OMEGA markings instead of the generic ETA markings.* The OMEGA 1120 was introduced in 1996 to replace the 21 jewel OMEGA 1109 used in the earlier Seamaster Professionals.

Where is the Omega calibre 1164 assembled?

I am not a watch appraiser. The Omega calibre 1164 is assembled at Eta in Grenchen and supplied assembled to our in-house T2. There is an assembly line for the Valjoux 7750 products in Grenchen where ordered calibres are assembled for the various clients according to the individual specifications that each customer requests.

What is the difference between Omega 1120 and Omega 1128?

The OMEGA 1120 was introduced in 1996 to replace the 21 jewel OMEGA 1109 used in the earlier Seamaster Professionals. See the Seamaster Pro Troubleshooter for more details on this change. *** The OMEGA 1128 is essentially the OMEGA 1120 with the addition of the 24-hour GMT hand, but lacking the quick set date.