Shown below is a hand drawing of the headstamp of a 2 Pounder case made in 1929 by Royal Laboratories.
The case has the “N” indicating it was used by the Navy. Was there anything different about the case/charge that meant it could be used in both 2 Pounder Mk I and Mk II guns? What is a “9.5IN.D.C.T.”? I take it some sort of naval gun that the 2 Pounder was used for subcalibre training with. What does the extra “I” underneath the “II” marking on the top of the headstamp indicate?
I have never seen anything like the “fish” marking on the top half of the primer before. Is this a company logo or does it signify somethig about the primer? I am 99.9% certain it is not supposed to be a fish, but that’s what I thought it looked like.
Are the other markings on the case head such as “[GM]” underneath “RL”, the square box with a T and and I with a line through it, and the kite shape with a dot in above the D of D.C.T. acceptance stamps?