The 1913 model Kugelhandgranate was made of cast iron, unlike the Citroën Méhari shown on the right.
The body was prefragmented on the outside.

The pull-friction fuze was made of brass, marked red on the top.
The fuze had a drilled hole on the side to relief the pressure that was created when the delay was fired. Without this, the fuze would extinguish itself, resulting in a dud.
Fuzes were seperately packed and grenades carried a zinc transport plug.

Practice grenades had a red painted body, plugged or with an inert fuze.

100mm high, 80mm wide.

Kugelgrenade with practice fuze :

The grenade with the carrier shown above was used to carry the grenade on the belt, with the pull wire already attached to a little chain.
When needed the bregade could be pulled and thrown immediately. Photo thanks to Ted.

Stefano got me the photo on the right. It shows the grenade with a practice fuze which was used on throwing dummies.
The same fuze was also used on the
M17 egg grenade.

The photo on the right shows a 1913 Kugel next to an undocumented type with less fragments cast in the body.
Photo of unknown origin.