It is a farthing,
There were 12 Hong Kong One cent coins from 1863 to 1905, 1862 Victoria
Half Cent,1822& 1825 Georgius IIII farthings,several India fractional anna coins 1862 -1889,quite a few french and Italian coins also, I still have about 70 coins to go through, some are slicks that will be next to impossible to identify.