Hoga Directime Jumping Hour Watch Hand-winding Mechanical Working Vintage Style

The machine has 17 jewels, and it is possible to wind the mainspring and adjust the hour and minute hands (rotating disc) by operating the crown.
The second hand (rotating disc) moves when the mainspring is wound.
The hour hand (time display rotating disc) does not rotate at a constant speed; it moves suddenly around the 60-minute mark on the minute hand (minute display rotating disc), then rotates gradually before switching completely; please note that I do not know whether this is the original specification or if the movement is sluggish.
I have confirmed that it works for several hours when put up for sale, and at this time, it works with a certain degree of precision if the mainspring is wound, but I recommend an overhaul if it is used daily.
Stainless steel back.
Comes with a new leather strap.
Case size: 1.42 inches (36mm including the crown).