The History of the Movement
Click on the images below to see an enlarged detailed view. Please find below the actual registered designs of the watches held on microfiche in addition to internal Omega production documents identifying the watches specification and configuration prior to retail sale.
Model Ck 14755
This used a 550 or a 552 calibre movement
Model Ck 165.014
This used the 552 or the 560 calibre movement
Model Ck 165.024
This used the 552 calibre movement.
Model Ck 166.024
This used the 565 calibre movement.
Model Ck 166.034
This is very rare photograph of a potential prototype with both day and date.
In 1955 Omega bought a small watch factory owned by and called Marc Favre, who had created an automatic calibre using a full rotor. In 1958 they produced the 552 calibre movement which was both shock absorbing and anti-magnetic with 24 jewels. 562 was the same watch but with a calendar function. The 565 (1965) came with a calendar function but also with rapid date corrector. The calibre 563 (1965) was produced for the American market and featured a calendar function but reduced to 17 jewels. The Calibre 560 was also for the American market; this was a 552 calibre reduced to 17 jewels (see below).
552 calibre (1958)
565 calibre (1965)
The United States in 1922 decided to introduce the Fordney-McCumber Tariff act requiring watches from Switzerland to be subjected to higher levels of import tax. Thus an unadjusted movement was taxed at $2.75 and an adjusted movement to 5 positions taxed at $6.50. In addition the tariff for ruby-bearing watches was $1.25 for 17 jewels thereafter $3 for 24 jewels. Omega responded to this impost by degrading the movement by replacing 7 jewels with metal bearings and coming in under the fiscal barrier.
Movement Serial Numbers
This is by no means comprehensive however this may be used as a guideline. It is quite common in the Seamaster 300 range for entire movements to be swapped out at service rather than do a parts replacement. So the movement number does not always align with the date of manufacture of the watch.