37mm or 2 Pr case ?

[37bis]

Hello,
I can't identify this beautifully engraved case.
Length : 138 mm
Caliber : 36,5 mm
Diameter of rim : 48 mm
However, the base is marked 2 Pr, which should correspond to 40mm (?)























Thank you for your opinions and help.
Didier

 

[ron3350]

All my 9.5" DCT cases are the full length 157mm and are not shortened or necked mouth.
This seems a very early case 1918 so maybe they were shorter and later used normal case length?
Additional question. When was the 9.5" Depth Charge Thrower first used?

 

[tigbrand]

Think it's been knecked down when it was trench arted. The 9.5 inch case is as a standard 2 Pdr.