FIRST SAILING WITH NEW 1/- PER HALF OUNCE RATE, Jamaica postal history 1863 entire written and postmarked London AP 1 63 with heavily cancelled GB QV 1/- green tied barred oval "12" to Messrs Barclay & McDowell, Jamaica backstamped Kingston-Jamaica AP 20 63 arrival. New rates were set from London and the rate to the British West Indies was increased from 6d to 1/- per half ounce on AP 1 1863, RMSP "La Plata" departed from Southampton AP 2 1863. £120