From time to time, I do the odd quartz watch. I like the technology, and if the movement is well made, it’s a joy servicing them! Not so much if it’s a £2 plastic movement, but this lovely Omega Seamaster that Tony sent in has a great little movement – the calibre 1420.
Looking at the bottom plate, your mind instantly turns to ETA, and so it is. The 1420 is an ETA 955.411, as you can see at Ranfft.I remove the circuit board, which I clean with compressed air, and then wrap it in watch paper until I put the movement back together. You can very easily damage the coil, and that would be the end.With the circuit removed, you can see the gear train.
And the movement is ticking again once a second, and not with the EOL indication.