A pair of antique Royal Navy / British Admiralty copper rum measures.

One is faintly engraved '1/2 Gill' and has the British Admiralty / Royal Navy broad arrow or crows foot mark. Also stamped near the rim with a crown shape and the letters V. R. 6 ( Victorian period 1837 to 1901 )  also the letter D. 

The second one is faintly engraved 'Gill' and has the British Admiralty / Royal Navy broad arrow or crows foot mark. Also stamped with the letter F. 

The original internal tin coating is present on both.