Identification list for ordnance, B.L. 5.5-inch, Mark III and ordnance, B.L. 4.5.-inch mark II on carriage, 5.5-inch or 4.5-inch gun, mark I Identification list for ordnance, S.B. 4.2-inch mortar mark 2 on mounting, 4.2 inch S.B.mortar mark 3 also plate, base, mobile 4.2-inch s.b. mortar, mark 1
