Looking for a working 1365 movement

Well you need 200 post to place a WTB.

My focus is on the 1342 line.

eBay is probably the best source. One has to do a lot of waiting. Save sellers, save searches. There were a lot of these watches produced. Many given away as service awards. Charity shops like goodwill are also a place to look. Prices on the latter can be a bit higher, but the product is usually untouched.

Testing the coil is fairly easy. If they have resistance they are probably good. Circuit boards are another matter. These are sensitive to static discharge, unless handled in a static free work place.

The movements need to be clean and oiled with little friction. There is not much power in the electronics.

There are testing machines what look for Radio Frequency (RF) leakage to see if the electronics are ticking. The speeds are fairly slow by modern standards being between 15 and 32 Kilohertz, which is at the top end to what can be heard.

could be. I have been working on designing my own tools and testers since I work with microelectronics (on pipe organs.)

Most of the issues are more likely from lack of use. Dried up oils are probably a factor. These old watches use metal plates and jewels. Modern quartz are injection molded plastic.

Many were designed to run on mercury which is 1.33 volts. Silver oxide is 1.55 volts so at the upper end. Lithium batteries are 3V. Leakage does happen. I suspect most of those are simply binned.

One could substitute modern chips, but these want 1.87 volts at the low end of the tolerance.

This is an awkward era. Millions were produced, so there is no incentive to do aftermarket parts. At the moment eventually the part will show up. Might be tomorrow, might be three years from now.

There is the other risk, is this can become an addiction. The hunt and chase for the part. Sometimes grabbing something just because it is there and the price is right. At least compared to pipe organs they do not take up much space.

I do think these are under rated. They have a satisfying heft to them which gives them a feeling of permanence, Something that was made to last.