This stickgrenade was a product from the Russo-Japanese war. It was first used in the conflict near Mukdenom. It was studied by the British resulting in the development of the No.1 Mk1. Lishin was the name of the inventor.
lenght with stick - 635mm
lenght without stick - 140mm
diameter - 35mm
diameter of fragmentation ring - 50mm
Total weight: 800gram , Filling: 200gram.
The protective cap is missing on the photos, the stick is a modern replacement. The grenade seems to be a variant on this "Lishin" grenade.