PhilaKorea 2014 World Stamp Expo Union Flag Faststamp set
Union Flag Post and Go Faststamps produced in Korea at the Exhibition from Royal Mail machines A3 003 or A004. Those printed from Jersey Post's machine are listed separately (FV07j).
World Stamp Expo
The datastring on theses is
B8KR14 A003-nnnn-xxx (or A004) where nnnn is the session number and xxx the stamp number.
Similar stamps with the same caption were printed in the UK sold by Royal Mail from Tallents House. These have the datastring
This is a Korea-produced Collectors Strip of 6.