Commemorating the brave Shetland Islanders, who risked their lives in World War II, shipping supplies, arms, saboteurs and agents to Nazi Occupied Norway. Known as the Shetland Bus; the return journey was an escape route for refugees from the Gestapo. The rare cover of which only 75 are known to exist bears two Hildasay Shetland Island map stamps, with red Hildasay cachet, plys Royal Mail Machin issue postmarked with Baltasound Shetland pmk. Dated 15/5/12 and re-cancelled by the Royal Mail with Scalloway Shetland Isl. Ship postmark dated 17/5/12. Seldom offered for sale.