Description copied from Bulletin#59 german hand- & riflegrenades, Mar.7 1944 :

Data: Overall length: 21inches, Length of body: 9inches, Length of fins: 11inches, Diameter of body: 4½inches, Color of body: Grey, Markings: P.W.M. 1 (L), Weight: 1kg, Filling: Cast TNT.

Description: The grenade consists of a metal body and a wooden handle to which are attached four canvas fins. The fins are held against the handle, before throwing, by a metal cap at the base of the handle. The body is made in two pieces crimped together and attached to the handle by a metal band. The fuze is located at the top of the handle and consists of a striker which is held away from the primer by a creep spring and two steel balls. The two balls fit into a recess in the striker and are held outward by a safety pin fitting between them, thus causing them to bear against the top of the striker housing and prevent the striker from moving down. Attached to the safety pin is a small length of tape which is held in by the metal cap and a semi-circular clip attached to one fin and fitting around the handle. Beneath the primer and in the base of the handle is a detonator and a picric acid gaine. The main filler is cast around a cone in the body to give a hollow-charge effect.

Operation: Before throwing, the cap over the end of the handle is pulled off and the fins held against the handle. When the grenade is thrown, the four fins fly out because of their spring ribs. When the clip attached to one fin is pulled away from the housing, this releases the tape which unwinds and pulls the safety pin out of the striker. During flight the safety balls move in freeing the striker which compresses the creep spring on impact setting off the primer, detonator, gaine and main filling.

This description is for the "L" model only.

Photos below © Rick Larson.

PWM Lang:
Length : 330mm
Diameter : 110mm
Weight : 1360gram.
Filling : 500gram Fp02-Hexogen , the rod is charged with nitropenta.
The fuze is called "Aufschlagzünder 23 für Panzerwurfmine".
Zündladung 34 is placed as booster charge.

PWM Kurz:
Length : 330mm,
Diameter : 110mm
Weight : 1000gram
Filling : 500gram Fp02-Hexogen.
Fuze : AZ23A für PWM/ Zdldg34.

Both grenades can penetrate armour up to 150mm.

(both photos below are quality reproductions of G-MAX)