Antique Pocket Watch - 19 Seikos

This is a Seiko Precision 15 Jewels railway pocket watch.
It is known as a working watch with high accuracy, favored by railway employees during the Showa era of Japanese National Railways.
The dial displays SEIKO PRECISION 15 JEWELS.
It features a small seconds sub-dial at the 6 o'clock position.
It is equipped with a manual-winding movement and can be used for a long time with proper maintenance.

The above is an AI assessment, but I am not entirely sure of the details.
It started running when I wound it.
Regarding accuracy, I'm not sure precisely, but at least it did not gain or lose more than a minute in 24 hours.

It was found at my parents' home, so it was likely my grandfather's. It appears to have been used, as there are minor scratches.
I would have preferred to use it myself, but I prefer to keep my belongings as light as possible due to my delicate health... and I feel it would be a shame to keep it stored away, so I would be happy if someone who will cherish it could have it.