2 WEIGHTS. George III. 1760-1820 (Overlapping denominations). Brass weights for a half guinea and a half sovereign. By The Royal Mint. Half guinea: 4.15 gm. 18.5 mm. Half sovereign: 3.96 gm. 18 mm. Both: a crown with a lion standing atop; ROYAL MINT 1821 around / Half guinea: CURT: WEIGHT HALF GUINEA around; 2 DW above, 16 GR above. Half sovereign: CURT: WEIGHT HALF SOVEREIGN around; 2 DW above, 13 GR below. Withers 2250B and Withers 2251B. Extremely Fine.