I

15.12 inches;

0.55 inch;

28.62 pounds;

0.58 inch;

TNT

There are two types of cartridge cases: (1) is used for a plug-in style of primer (diame-ter of primer 0.83 inch); (2) is used for screw-in type of primer (diameter of primer 1.3 inches).

On base of case is stamped year of manufacture, lot number, and caliber of piece.

1. Nose Percussion Fuze Model 18. German designation, A.Z. 24/31 RYC wz 18.

2. Nose Percussion Fuze Model 15. German designation, A.Z. 24/31 Wz 99/15.

3. Time and Percussion Fuze Model 18. German designation, Dopp.Z. 24/31 A wz. 18.

4. Time and Percussion Fuze Model 15. German designation, Dopp.Z. 24/31 LD 17.

There are three types of the Nose Percussion Model 18:

(1) Instantaneous (B.Z.) tip painted green.

(2) Short delay (K.Z.), black.

(3) Long delay (D.Z.), black, detonator violet.

And three types of the Nose Percussion Fuze Model 15:

(1) Instantaneous (B.Z.), upper part of fuze painted white.

(2) Short delay (0.05 second), upper part of fuze painted black.

(3) Long delay (0.15 second), upper part of fuze painted black, detonator violet.

Time and percussion fuze Model 18 has a cap which is black with a green strip on its lower edge. Maximum time of delay, 31 seconds.

Time and percussion fuze Model 17 is similar to 18. Maximum time of delay, 51 seconds.

REMARKS: The position of the rotating band, it will be noted, is the only distinction bet-ween these two projectiles.

These projectiles have fallen into German hands in considerable quantities and are repor-ted to be in use with the German Army.

Figure 475 – H.E. Projectile, Model 15, for Skoda Howitzer, 105-mm