ANTIQUE! RARE! "English PEWTER" HALF GILL Measure Cup - "Gaskell & Chambers"

This ANTIQUE! It is stamped on the front of the cup "Half Gill" and on the base is stamped "Gaskell & Cambers Birmingham. On the rim of the cup is stamped "G R" and a symbol of a "Crown" for George V. Also on the rim is stamped H26.