Switch No1 Mk1 Pull was developed by MD1 in 1939 ,
Requiring a pull of 2lbs it is used to initiate boobytraps or demolition charges.
This is example is lightly stamped with what appears to be MD1 A14
Please feel free to add more images and information to this post
More detailed information can be found here on Lex,s site http://www.lexpev.nl/fuzesandigniters/unitedkingdom/switchno1pullmk1.html
Requiring a pull of 2lbs it is used to initiate boobytraps or demolition charges.
This is example is lightly stamped with what appears to be MD1 A14
Please feel free to add more images and information to this post
More detailed information can be found here on Lex,s site http://www.lexpev.nl/fuzesandigniters/unitedkingdom/switchno1pullmk1.html