I'm back to the old quartz watches again today.
Today's model is one of the Citizen Quartz models with the CQ logo, showing that it is one of the early models (70s or early 80s).
It is a 3 hand dial model in a stainless steel case with a white dial without numbers. The dial also features small green dots at each hour marker at the edge of the dial with two dots at the 12 o'clock position. There is also a day and date window at the 3 o'clock position, and the day can show in English or Japanese. This model also has a screw fastening crown for extra security.
It uses the 7100 module which is a Citizen Quartz model. The circuit has a crystal operating at 32,768Hz which is taken down to 1Hz by the dividing circuit. This signal is amplified enough to drive the rotor of a stepping motor. This movement was the thickest of the 71XX modules, and one of the first. It should last around 2 years on its battery which had an official part number of 280-17.
The strap is a stainless steel Citizen Watch Co design with the CQ logo on the clasp.
The model number on the dial is 7100-710123-X, and the number on the back is 4-730135. Based on the design, I think it is a late 70s model.
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