George 1V bronze weight with lead filled centre, 1820-30.
1.460"x .293"x 19.5 Oz.
Stamped G.1V under crown also the word IMPERIAL.
Counterstamped with a large billhook and a horseshoe over a capital R or H?
20oz was the weight of a pint also the weight of £5 in silver coin, the fact this is 1/2 oz light may be the reason for the counterstamps?