Larry the 3 Tons mark will be absent as the re-proof was for Black Powder. First proved in London for BP then recently re-proved for BP in Birmingham. They changed the BP re-proof mark a few times in the last few years. I think the last one I had re-proofed with those marks was sometime in the 1990's. Can't quite read the date code in the crossed sceptre mark but if it's 'RB' then that is 1966. The 3 Drams 1 1/8th. ounce is the maximum service charge. Note: Not Nitro! Lagopus.....