About workshop
https://asiamedals.info/threads/badges-and-watch-fobs-made-by-suya-shoten.18310/#post-291362
1st variation (double pin with mark スヤ).
スヤ - Suya
Typical case for this variation.
Probably the oldest manufacturer and supplier of military goods (regimental flags, uniform, edged weapon, etc) for Imperial Army and Navy. Was active since very early Meiji until the end of WW2.
Today it is mainly known as a main supplier of gunto koshiraes, but this workshop was also actively...