Guernsey Mint Stamps Guernsey Mint Stamps Posted on September 12, 2018 by john 12 Sep Guernsey Mint Stamps. Two sheets of Mint Guernsey Stamps (See Pics) 10 off Service 65P and 10 off Selflessness 58P Mint Stamps. Price including UK Postage and Packing £12.00 john Life Time of Service Ascention Island Sponge Bob and Friends Unite