An absolut wonderful version of the early German ball grenade. Army designation was "Khgr. Uz".
This had a clockwork delay fuze which was activated by pulling the blocking pin on top.
Pulling this releases the clockwork which would initiate the primer after a few seconds.
Both sketches were provided by Dimitar.
The grenade was designed by Feuerwerker Machenbach.
All photos © B. Bosman.