DESCRIPTION. The mine consists of two main components, the tray, see figure 228, and the charge.

Tray. This is of sheet metal and carries a horizontal rib slightly above the shear wire ho-les. On its underside is the word UNTEN (bottom). Two shear wires pass through holes in the sides of the sheet 4 inches from each end. Holes 3/16 inch in diameter are located approximately 1 - 1 4/10 inches from each end and can be closed by small shutters on the ouside of the tray. At the ends of the tray are flanges, of which one is solid while the other carries a central slot to permit insertion of the stirrup of the Z.Z. 42 actuating pin. On the outside of the tray at each end is a rotatable arrow which can be sent to SICHER (safe) or SCHARF in counterclockwise direction (viewed from the outside). Rota-tion of the arrow will rotate the disc in a clockwise direction (viewed from the inside) and lift the arm into a horizontal position, where it is locked by the spring-loaded catch. In this position the Z.Z. 42 igniters bear against the flange of the arm and will function if the charge is depressed. The only method by which the catch can be with-drawn, allow-ing the arm to be lowered and disarming the mine, is by inserting a pin upwards through through a small hole 1.8 inches in diameter, in the base of the tray about 3/16 inch from its end. This forces upwards the arm of an angle-shaped piece; the other arm of this piece engages in the end of the catch and withdraws it.

Charge. This is encased in a metal container which is provided with four igniter sockets – two end sockets for the main Z.Z. 42 igniters, as in the standard R-Mine 43, and two subsidiary sockets, also in the ends of the charge near the top left-hand corner when the charge is viewed end-on. These last two sockets are normally kept closed by screw plugs.

OPERATION. The mine will fire under a pressure of 440 pounds at the ends or a pressure of 880 pounds in the center. When these pressures are applied, one or both shear wires are sheared and the charge falls into the tray. As the charge falls, the detent pin is pushed out of one or both of the igniters by the shoulder of the actuating plate thus firing the mine.

REMARKS. Principal differences between Riegel Mine 8 kg. and Riegel Mine 43 are listed below:

4. There are auxiliary igniter sockets at the ends of the charge, but none in the top or sides.

5. The shutters for closing the safety bar holes are on the outside of the tray are not spring-loaded.

6. There is no reinforcing bar on the charge where it rests on the shear wire, nor is the tray lines inside to insure a neat shearing. Thus, in the specimen found, the shear wires had suffered noticeable saggings without being sheared.

Figure 228 – Spreng Riegel 8-kg Antitank Mine