This model of the Tellermine, like the 35 model described in Pamphlet No. 8, is designed to function by pressure applied to a contact fuze or by detonators in the side and base which may be initiated by "booby trap" devices or by instantaneous detonating fuze con-nected to another mine. In this model the fuze is situated beneath the cover plate as-sembly.

The mine is 12.8 inches in diameter and has a convex head with a central recess, ap-proximately 7 inches in diameter, from which the main cover plate and the fuze cover plate protrude. The main cover plate is corrugated radially and has a plain retaining ring surrounding its base. The fuze cover plate protrudes from the centre of the main cover plate and has six carved surfaces formed on its flange to faciliate turning by hand. The overall height of the mine with the cover plate assembly is 3.7 inches. The weight of the mine with its amatol bursting charge and P.E.T.N./wax exploders is 17 lb. 15 oz. The ex-terior is painted a dark grey but will probably also be found with camouflage painting.

The fuze is similar to that used in the British anti-tank mine R.E. No. 1 and is described in this pamphlet. A load of 570 lb. applied to the cover plate above the fuze will cause the fuze to function. The required load decreases toward the periphery of the main cover plate because of the lever effect and at the outer edge may be as one half of this amount.

The body is pressed from sheet steel and consists of two main parts, the charge contai-ner and the base plate. The base plate is fitted to close the base of the container after filling and is turned in at its circumfernce to engage a flange at the base of the container wall. A brass detonator holder is screwed into a hole with a socket in the base about 2.2 inches from the centre. The holder is screw-threaded internally near the mouth to recei-ve a pull igniter. The charge container has a similar detonator holder screwed in the side wall. The head of the container is convex and is shaped to form a concentric circular re-cess of 7 inches diameter with a fuze socket welded at its centre. A detonator holder of steel for the main detonator is fitted to the base of the fuze socket. A locating ring with a circular groove to receive the base end of the cover plate spring is fitted around the socket in the recess. A steel retaining ring fitting round the wall of the recess is secured by indentations at intervalls in the wall and ring. The top of the ring is turned inwards to form a flange which retains the main cover plate by engaging with a flange at the base of the cover plate. The bottom of the ring is also curved inwards to present a suitable bearing surface for a  skirting of red rubber the lower edge of which is held between the retaining ring and the wall of the recess.

The main cover plate is approximately 5.8 inches in diameter with a 0.5 inch cylindrical wall flanged at the base to engage with the retaining ring in the charge container. The top of the plate is corrugated radially and rises slightly towards the centre where a screwthreaded hole is formed to receive the fuze cover plate. A locating ring for the top of the spiral spring which supports the main cover plate is spot welded to its underside. Two supporting rings between which the upper edge of the rubber skirting is held are attached beneath the main cover plate. The uppermost ring is in the form of a hoop with an internal flange at the base. This ring fits into the underside of the main cover plate where it is secured by spot welding. The lower ring is in the form of a slightly dished washer with a larger external diameter than the upper ring. The two rings with the top of the rubber skirting held between them are held together by spot welding.

The fuze cover plate screws into the top of the main cover plate and is recessed at the underside to fit over the top of the striker protruding from the fuze. The plate is in the form of a plug with a flanged head which has six curved sides to provide a handgrip. A rubber sealing washer is held between the flange and the main cover plate.

The bursting charge consists of 10 lb. Amatol 50/50 which is filled from the base to a density of 1.59 and covered with a coating of black bituminous paint. An unwrapped ex-ploder pellet of pressed P.E.T.N./wax 91/9 is inserted to form a surround for each of the detonator holders during the process of filling. The weigths and densities of the pellets are:–

Exploder for main detonator 5 1/2 oz. density 1.57

Exploder for side detonator 3 1/2 oz. density 1.58

Exploder for base detonator 2 3/4 oz. density 1.57.

The main detonator is attached to the fuze by means of an adapter and is described with the fuze in this pamphlet.

Fig. 1