Fuzing: Type 100 experimental projectile used type 93 small instantaneous fuze; other two projectiles use type 100 small instantaneous fuze.

Color and markings: Black body with red band just aft of bourrelet, green and yellow bands forward of rotating band. Type 100 has stenciled on body, type experi-mental has stenciled on body, and type 100 Mod 1 has stenciled on body.

Weapons in which used:

Type 97 antitank gun.

Type 98 antiaircraft/Antitank gun.

Remarks: The projectile is made of steel with two cavities separated by a septum. Leading through the septum and into the explosive cavity is a black powder leadin. When the tracer has burned out it will ignite the lead-in which will detonate the explosive fil-ling.

There is an ealier model of this projectile, designated type 100 Experimental which does not have a self-destroying feature.

There is also a type 100 Mod 1 which differs from this projectile in that it is filled with black powder instead of cyclonite.

Figure 211 – Type 100 20-mm High-Explosive Tracer
(Self-Destroying) Projectile.