Elsewhere we came across the Aasen parachute grenade that was briefly used by both France and Germany. There are a few photos on the web, but in one or two the Aasen doesn't look quite right. I think it possible that they must be of this similar device, the Italian/French Thévenot Type P2. You'll notice it doesn't have a percussion fuse like the Aasen but a propeller that screws the detonator into the charge during flight.
You'll also notice that the captions are in German. Interesting reason. The Austrians issued their assault battalions with manuals on Allied (inc. Russian) hand grenades so they would know how to use captured stocks.
It also emerges that Russia had long-handled stick-grenades very similar to the British Hales
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
The propeller does not screw the detonator at all, the threaded pin screws in and is stopped by the upper spring under the propeller, the rest of the shaft is undercut to allow it to slide through and hit the primer when it lands point first on the ground
