Non-electric detonator , made of aluminium. The filling consisted of 9grams A.S.A and Tetryl. This detonator replaced the No.8.
Photo on the right and the two below thanks to Dave Sampson.
Mk I : Length : 44,4mm Diameter : 6,3mm
This container consists two halves, shut on both ends by two metal screw lids. One side fitted 10 detonators and a bakelite rectifier which was used to clear the space for the detonator. The other half had 15 detonators installed.