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Neeb
·I have a 564 from 1967 and a 751 from around 1971. It's noticeable that the copper(?) coating on the older movement is shinier and a more reddish colour, while the coating on the later 751 more gold in tone and has a matt finish. Did Omega change their method of plating these movements at some point, and what exactly was used to do it?
Another observation is that the older movement seems better finished. On the rotor, as well as the well-documented change to the rounder shape of the part of the rotor where the pivot is, there is chamfering at the edges of the earlier version, while the later rotor lacks this. Also, there is some decorative texturing at the edge of the movevement plate (fine curved lines) on the earlier movement that's lacking on the later one.
I guess that there was an attempt at cost-saving towards the end of the production period of this movement series as the quartz crisis started to bite. Just wondering if the details of these changes and their precise chronology are documented anywhere?
Another observation is that the older movement seems better finished. On the rotor, as well as the well-documented change to the rounder shape of the part of the rotor where the pivot is, there is chamfering at the edges of the earlier version, while the later rotor lacks this. Also, there is some decorative texturing at the edge of the movevement plate (fine curved lines) on the earlier movement that's lacking on the later one.
I guess that there was an attempt at cost-saving towards the end of the production period of this movement series as the quartz crisis started to bite. Just wondering if the details of these changes and their precise chronology are documented anywhere?
