Citizen Cosmotron 7804A Electronic Watch Complete Maintenance

Hi, I'll try to give complete maintenance on a Citizen Cosmotron. Let's disassemble the movement and see what makes it different from other mechanical watches.

I couldn't find any restoration video on this movement - Citizen 7804A. Also, I couldn't find the technical guide on the Internet. I found some pieces of information in Japanese. The normal amplitude range should be 180 - 260 degrees. Since this is not a Swiss lever escapement watch, there should be a beat error. I couldn't find the typical range, though. Other than that, it looks the same as other mechanical watches. Anyway, I might do something wrong in this video. If you have any information about this movement, please let us know.

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