I am posting this here, because it is closest in size to a wristwatch. I'm not sure how to take it apart. It has a manual wind movement and sets and winds through the stem. The meter on the left side of the dial is a 0-12 minute scale. I assume this is used to record phone length for a pay phone. The button on the bottom resets the meter. The back turns counter clockwise as well to wind something. It looks like this was part of something bigger and the back would contact something electric to set off an alarm or stop a call. Has anyone ever seen or used one of these before?
Most visitors online was 1660 , on 12 Dec 2020