Sweden. Military coverThe Swedish Åland Demolition Detachement 1919. A nice early letter with correct 7 öre local postage and machine-cancel "STOCKHOLM 1" 3.5.19 on a nice mounted page to a Swedish 2nd Lieutenant at the Swedish Detachement at Åland. Letter content is still enclosed. Good quality but slightly worn at top left. Rare and a postal history exhibition item!