If you need to catch up - click here. It's an Austrian stick grenade. Sanger was probably most correct, overall. This grenade one is a Rohrhandgranate (Alt) or literally, Tube Hand Grenade (Old), as vice the "Neu" or New. The handle is a cardboard tube, with a taped over end that held the fuze string. In the case of mine, this tube is almost certainly a replacement - aside from it's condition for a 90-year old cardboard tube, it also doesn't project through the ball as it should...