This hand grenade, made of terra cotta, and, like the Model 3 Flower Pot Land Mine, filled with Type 88 explosive, is assumed to be a Navy weapon. Except for the neck at the top, it is spherical, consisting of two halves baked together. It is light brown, in color, and lightly glazed both inside and out. The grenade is encased in a straw-colored, waterproof rubber sack.
The ignition system consists of a match composition and scratch block, a 4-5-second delay element, a lead azide initiator, and a tetryl booster. All are encased in a rubber tube except the match composition which is lacquered into the neck of the grenade. In order to operate the grenade, the small rubber covering is removed from the top and the scratch block is struck on the protruding match composition, igniting the delay element.
SPECIFICATIONS
| Height (base to top of neck) | 99 mm—3.9 ins. | |
| Diameter | 79 mm—3.1 ins. | |
| Total weight | 1 lb. | |
| Weight of explosive | 100 grams—3.5 ozs. | |
| Pottery thickness | 7/16 inch |
Japanese: p. 304.2 (April 1, 1945)
This is a thin-cased offensive type grenade with a B. Z. E. friction igniter screwed into the top. The cylindrical body is made of aluminum and painted yellow. There are two models of this grenade, one 3 5/8 inches long and the other 4 inches long. This grenade may also be used as a booby trap by the insertion of a D. Z. 35 Pressure Igniter. To operate the grenade, the head of the igniter is unscrewed and pulled, drawing the wire through the friction composition and igniting the delay pellet. The grenade is then thrown and after a 4-5 second delay, the delay element initiates the detonator.
This grenade consists of a thin egg-shaped case filled with an explosive charge, and a friction type igniter with a delay pellet. The upper end of the friction wire in the igniter is attached to a disc in the head which screws on to the top of the body. In operation, the head is unscrewed and pulled, drawing the wire through the friction composition and igniting the delay pellet. After a delay of from 4 to 5 seconds the pellet initiates the detonator which in turn sets off the explosive filler.
The head of this grenade is a thin steel casing containing the explosive filler. This is screwed onto a hollow wooden handle through the center of which runs a double length of cord. This cord connects at the forward end to a friction pull igniter (B. Z. 24) and at the rear to a porcelain ball in a metal cap. In operation, the cap is removed, the porcelain ball pulled, and the missile thrown to detonate after a 4-5 second delay.
This grenade, a new type of offensive weapon, has no outer casing or cover, but consists merely of a disc cut from a pre-cast or pressed pellet of explosive, and an igniter. The disc, which is believed to be R.D.X./wax, is 3 5/16 inches in diameter and 17/32 inches thick. It is drilled to receive the igniter and detonator.