Here is a comparison of T&P Fuzes No 213 MK 4 and MK 4/1 made by BW (ROF Blackburn,Manchester ,West Block)
Mk 4 is brass base BW /55 LOT
MK 4/1 is alloy base BW /58 LOT 161 360732.
Both graduated 0 - 80 and have never been filled. Clockwork Mechanism.
Introduced in 1944 . 8 marks. For field guns 3.7" to 7.2"
Mk 4 is brass base BW /55 LOT
MK 4/1 is alloy base BW /58 LOT 161 360732.
Both graduated 0 - 80 and have never been filled. Clockwork Mechanism.
Introduced in 1944 . 8 marks. For field guns 3.7" to 7.2"
