UNITED KINGDOM (2013). Post&Go - Union flag - 'Australia 2013 World Stamp Expo' - A5GB13 B1. Set 6 values
Hytech - Postalvision (10.05.2013) - Post&Go. Union flag. Special overprinting 'Australia 2013 World Stamp Expo'. Code A5GB13 B1. Mint strip with the 6-values set (1st Class - 1st Large - Europe up to 20g - Worldwide up to 10g - Worldwide up to 20g - Worldwide up to 40g). Receipt on demand.