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 and from the Jersey Post machine JE01
World Stamp Expo
The datastring on theses is
B8KR14 JE01-nnnn-xxx where nnnn is the session number and xxx the stamp number.
This is a Korea-produced Collectors 1st class Union Flag stamp on official PhilaKorea2014 cover, cancelled with Royal Mail cachet 7-12 August Philakorea2014.
Note this is not a postmark.