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Oops, I did it again. I'm really trying to stop buying watches for a bit, but stumbled on what I thought was a very cool-looking watch from the late sixties/early seventies. I dug the "atomic transistor" logo, and it looked super clean. Being that it was in a monocoque case, and that I bought a crystal vise to deal with them, I decided to take the gamble. It just looked really clean. The insides were just as clean as the outside, and the battery checked out to 0 volts, so I knew one thing. Since this ESA Dynatron movement takes a rather odd battery, 344/1136, I had to wait to get one delivered. It came today and I put it in the watch. At first it wouldn't get going. Then I remembered that it has a hacking mechanism and the stem was in winding position. I popped into "wind" position and gave her a little twist and off she went. It seems to run pretty well but if the stem is pulled out and the watch stopped, it takes a twist to get it running again. I don't know if it's designed that way or the watch is somehow out of electronic beat? Anyway, I'm stoked on the watch. It's very cool to watch the hybrid mechanism that has a balance wheel that is impulsed electronically. I hope the video I took with my phone shows up. If not, you can take my word that it's running. IMG_0855.MOV

That is fine because the cast construction is not subject to distortion, and being of the lever type it allows better feeling. Often what makes the difference is having the correct dies in terms of shape, size and material.

Best way i have used to tighten the cannon pinion on this is to use a staking tool. A rounded punch and give the center of the wheel a slight knock. Making the hole for the minute pinion a little tighter. Best is to replace the complete unit.

You could snap up ebay item 111841129225 if this includes what you need. Alternatively, since it's always useful to have a variety of spare screws available, you could go for a mixed set like https://www.cousinsuk.com/product/all-kinds-mixed-screws-wristwatch where there's hopefully a good chance you'll find a match!

For everyone who likes of visual presentation of what's described above for finding the lift angle there's a link to a video below. Then the second link lift angles from modern watches unfortunately nothing for anything older. Which means you have to do the procedure in the video unless you have a really expensive timing machine the Swiss now make which will determine this automatically. Then this is an interesting project limited quantity watch that somebody cannibalized probably clueless as to what they had. Restored back to running condition makes for a really interesting conversation piece. https://www.youtube.com/watch?v=-Xgcck692js https://www.witschi.com/assets/files/sheets/Scope Schlagzahlen def 2-3.pdf

Yes I like the ESA transistorized movements. I have one that is in my collection with an ESA 9154 and a bunch of others that are in various stages of [dis]assembly. J

I thought I'd better upload a photo of the camera USB port wiring.