Although in good condition, this example was not running when I bought it, except for a few seconds when shaken or wound. Otherwise it seemed to be winding properly by hand and the sound from the rotor seemed ok. Time setting and date change were also fine. I had thought that I could maybe do a movement swap if necessary, so it was time to take a look inside.
The case is a one piece design, so access to the movement is from the front. The crown is a two piece design, and it has to be pulled quite hard to remove it. This has to be done of course to allow the movement to drop out of the case once the crystal is off – it’s a little disconcerting since a fair bit of force is needed. But once off the way the two parts connect is clear:
The crown and outer stem is pushed into this slot:
After carefully prising off the bezel, I found the crystal was not keen to come out. I checked with Brian Leiser first to see if any special tools were needed, but he advised (thanks Brian🙂 ) that no, but the crystal is likely to be tight to the gasket after possibly years of no attention. Using a suction cup didn’t help, so I very carefully and gently levered the crystal up (using a loupe to watch closely what I was doing), trying to engage with the metal ring on the lower part of the glass rather then the glass itself. I could see it was moving a little so after working round the glass and gently easing it, I found the suction cup did lift it off, without any damage done…phew!
Interestingly I found the watch immediately started to run once the glass was off. And when I replaced the glass, it did not run. The solution was simple – a slight re-shaping of the second hand, bending the tip down a little since it had been touching the underside of the crystal. So no change of movement or repair needed🙂 And it’s a nice movement, the 1121 Jet first produced in 1962:
The watch is now running flawlessly, and keeping very good time. I wonder how long it has had the problem with the sweep hand – the difficulty in removing the glass suggests it hasn’t been opened up for quite some time. It was an easy enough adjustment to make – as it had to be for me to sort it out! – so I’m surprised it hadn’t gone to a watchmaker for repair.
I’m still trying to figure out the ‘DMC’ logo on the dial – I have seen this on a diver but with a very plain font used. I have found that there is a DMC machine tool company in South Korea – founded in 1944 it makes machinery for milling etc. Citizen opened a factory in Korea in the early 1970s so I wonder if there is any link? Nor can I explain the 777 logo – maybe just a model name referencing Citizen’s later use of the Autodater 7 moniker. ‘555’ models were also made including one with the same 27 jewel movement, and the use of 555 is also a mystery!