question on 3,7cm shells (38,1cm length)

[jozefb2009]

Hello,

Does anybody know the meaning of the letters 'Po' on picture 217a?


Does anybody know the meaning of the letters 'Pc' on picture 440a?


Does anybody know what might be written behind the roman numerals 'II' in picture 440a2?


Which ship would have used the above 2 shells?

Does anybody know the meaning of the letter 'E' in picture 240a on the usage of this shell?



Thanks,

Jf

 

[2pounder]

No knowledge of their meaning but mine's marked P319J dated 1940.