13–040-915

NAME – Model 1915 Disk Grenade

NAME (NATIVE) – Discushandgranate 15 newer Art (Discus hand grenade 15 New model]

COMMON NAMES – “Turtle,” “Tortoise,” or “Oyster” grenade (British)

TYPE – Blast-type hand grenade

COUNTRY OF ORIGIN – Germany

DATE OF MANUFACTURE – 1915

LENGTH – 11.8 cm (4.65 in)

WIDTH (DIAMETER) – 11 cm (4.33 in)

WEIGHT – 0.415 kg (14.6 oz)

EFFECT – Blast with minor fragmentation

BURST RADIUS – 5 m (5.5 yards)

FUSE TYPE – Centrifugally-armed with multiple percussion caps

FUSE INITIATION – Impact

FUSE DELAY – None

FILLER – Cheddit explosive mixture (78% Potassium Chlorate, 10% Dinitrotoluene, 12% Sawdust)

FILLER WEIGHT – 0.13 kg (4.59 oz), divided into two bagged charges of 0.065 kg (2.29 oz) each

FILLER EQUIVALENT TO TNT (R.E.) – 0.72

AVERAGE RANGE – 37 m (40 yards)

COLOR CODE – Field gray or black painted body, brass fuze caps

MARKINGS – May have paper label on body reading “Vor Gebrauch Sprengkapsel Einsetzen” [Before use, insert detonator}

MANUFACTURER – State arsenals

STATUS – Obsolete

SERVICE – Imperial German military

There were three different types of discus hand grenades. The form shown in the picture is from 1913, weighed 360 g (20 g explosive charge) and had a diameter of 80 mm. The 1915 form on the left was slightly larger (diameter 110 mm) and weighed 415 g, of which 130 g went to the explosive charge.