British 2pr No 1 MkII Case With Electric Primer

[oldshotandshell]

Standard 2Pr AA Gun case dated 1944 but with a No13 MkII electric primer dated 1939. I'm 99.9% certain that the primer has never been removed from the case, so why electric not the usual No27 percussion? Any thoughts appreciated. Thank you.

 

[Big Dave]

Used in the 40mm Vickers S gun ?

 

[Burney Davis]

Used in the 40mm Vickers S gun ?

Unlikely I think as the case and primer are both Naval marked and not barred out. It is unusual to see a primer predating a case by over 4 years.

 

[oldshotandshell]

Also, was the S Gun electrically fired? I can't find that info on the Internet. Most of the data is the same info just worded differently. Anyone got an S Gun manual?!

 

[ydnum303]

Possibly a propelling cartridge for a depth-charge thrower? Having said that, the 2-Pdr cases I have seen that were used for that purpose have had "DCT" stamped on the base, and have had slots cut in the mouth.
R.