Grenade, defensive, MkII

At the end of WW1, the Mk1 defensive grenade was re-developed in both body-form and fuze mechanism.
The body of the new grenade has a tapered base with 40segments. Filled grenades were painted black like the Mk1, but somewhere in the 1920's the base colour became grey.
Old Mk1-style fuzes were altered into the type shown on the right.
Grenades from this period were filled with TNT or Trojan Grenade Powder and therefore the fuze was fitted with a (No.6 fulminate) detonator.

Right photo © Jon Gawne.
This sectioned grenade is an early type which is fitted with the MkII bouchon as used after WW1.

On the right: a 1920's produced Mk2. A grey body indicates a loaded body and it was fitted with the altered Mk1 fuze. The body has a plugged filling hole.

This fuze is also fitted with a rare dirt cover.

Photos © Dr.Ruby

Grenade, Hand, Fragmentation, HE, MkII

The body and filling of this grenade was the same as the "grenade, defensive MkII".
Somewhere late 1930's the body colour was changed to yellow to indicate that it has an explosive charge.

It was fitted with the M5 or M6 detonating fuze which was packed seperately from the grenade.

Right :The grenade on the box should be yellow...

Grenade, Hand, Fragmentation, MkII

Hence the missing "HE" in the name.
This grenade had deeper grooves and was issued with an M10 serie igniting fuze.
The body is painted yellow and has the filling hole in the base.
It was loaded with EC blankfire powder, which did not need a detonator. This is nowhere indicated on the body, only the fuze markings will tell if it's detonating or igniting.

From 1943, this same grenade was issued in olive-drab, sometimes painted over the old yellow paint.
A yellow band around the neck indicated that the body was loaded (EC). M10series fuze.

Grenade, Hand, Fragmentation, Mk2A1

The Mk2A1 seems to be the last change in body style and was issued in late WW2. It served up to the first years of the Vietnam war.
The only difference from the MkII framentation was the missing filling hole in the base.
It was issued in both EC blankfire powder ánd TNT, respectively M10A2/M10A3 fuze or M6A4C/M204A1 or M204A2 fuzes. Only the fuze markings tell the difference.

WW2 issues started off with yellow bodies but was soon altered to olive-drab-yellow band.
Green-over-yellow is also known.

Total length: 114mm
Length body: 90mm
Diameter: 57mm
Weight: 635gram
Filling: 57gram flaked TNT or EC blankfire powder.

Photos Christian.

The Mk2A1 shown right of this text is a post-war assembly.
It has an M204A1 fuze fitted, as also marked on the cardboard tube.

Photo © Cory.


Photos below thanks to Dr. Ruby

WW2 production line :

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