WW2 Seaman Gunner RA (DEMS) WW2 Seaman Gunner RA (DEMS) WW2 Seaman Gunner RA (DEMS) £10.00 Reproduction. WW2 Style. Machine embroidered thread on a wool cloth backing. Manufactured by Monty's Locker. Worn by RA Gunners attached to DEMS (Defensively Equipped Merchant Ships). Please note you will receive this badge as a set in 2 parts - the upper part is the Seaman Gunner Badge and stitched directly below is the DEMS title which was actually issued as a separate piece.