An interesting, hard to believe it exists, Citizen automatic pocket watch.
Why should a pocket watch be an automatic? How come it has a display back? I will try to gather more information about this and I hope I will get some answers. For now, this is the watch, an automatic Citizen pocket watch, a 36000 bph, Leopard, with a 7230 calibre.
For now, after more than 12 hours, it is spot on and didn’t lose or gain a second.
A little bit more info added. Read here what I found out so far: