British, WW2 40MM Mark I Bofors Brass Shell Dated 1939, with Training Projectile dated 1974, Shell Made by Royal Laboratories Birtley (RLB), Inert
British, Naval 4.5in Brass Shell Case, Dated 1988, Made by Royal Laboratories Birtley (RLB) from Falkland ship HMS Glamorgan
British, 40MM MK 4 Naval Bofors Shell Case, Dated 1956, Made by Royal Laboratory Birtley (“RLB”)