The back of the watch showing the self winding mechanism.
https://cdn.masto.host/velocipederidercom/media_attachments/files/113/872/612/692/048/878/original/e3ed0bc62f23cac3.jpg
@timmy Yes it is an "automatic". Here is a picture of the back. That weight moves when you move, causing it to self wind while you wear it.
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