This purdy is a Zenith 46.0. A 7 jewel movement based on the ESA 9361. A really high quality quartz movement in the late 1970s and thanks to the Ebauches architecture easy to service.
The pics are from a donor watch I scored off eBay and was happy to see that dial, hands and movements are really minty.
I have another example ticking away in a 1979 Defy which hasn't lost or gained a single second since re-setting it on Nov. 22nd 2019.
So, if you think vintage Quartz are inaccurate and terrible to service, think again






great post and images man! very insightful information for those sleeping on some breathtaking vintage Quartz pieces.
Beautiful movement. Brilliantly photographed.