13-037-915

NAME – OF-1 Hand Grenade

NAME (NATIVE) – Offensive No. 1

COMMON NAMES – Blue Egg Grenade

TYPE – Blast-type hand grenade

COUNTRY OF ORIGIN – France

DATE OF MANUFACTURE – 1915

LENGTH – 12.3 cm (4.84 in)

WIDTH (DIAMETER) – 6 cm (2.36 in)

WEIGHT – 0.25 kg (8.8 oz)

EFFECT – Blast and light fragmentation

BURST RADIUS – 11.5 m (38 feet)

FUSE TYPE – Percussion fuze, later Model 1916 B Billant Automatic Igniter – Pull ring/safety lever (1916)

FUSE INITIATION – Impact on top of exposed fuze or release of safety lever

FUSE DELAY – 5 to 6 seconds

FILLER – Cheddite #1 (Sodium Chlorate 79%, Dinitrotoluene 16%, Castor Oil 5%)

FILLER WEIGHT – 0.150 kg (5.29 oz)

FILLER EQUIVALENT TO TNT (R.E.) – 0.50

AVERAGE RANGE – 32 m (35 yards)

COLOR CODE – Blue body

MANUFACTURER – State arsenals

STATUS – Obsolete

SERVICE – French military

     The grenade has a fairly thin stamped sheet metal body only 3mm (0.118 in) thick