Brit39 the maximum head size is

the maximum head size is 57cm

Brit35 - The shell is an original WW2

It may have been  re-issued in the Korean War as EGA stamps have been applied

it has a plastic frame with a vinyl type liner and a draw string

Brit39 the maximum head size isBrit39 The shell is an original WW2, British manufactured MkII shell with a stainless steel banded edge. The stainless steel chinstrap lugs are the MkIII type and are very faintly marked III 1940. The factory stamps under the flare are JSS 57 1 1941 (Joseph Sankey & Sons Ltd, Bilston). When acquired the shell outer had multiple layers of paint, the top layer was red; the inner was covered in layers of grey. The shell cleaned up nicely; it was stripped