Great Britain. (Sweden). 1859. Unpaid envelope addressed to Sweden cancelled by boxed London date stamp, endorsed 'via Ostende', routed via Hamburg with 'K.D.O.P.A./ Hamburg' of the Royal Danish Post and 'K.S.P.A./ Hamburg' of the Royal Swedish Post Office, Hamburg, rated '7' in blue ink claimed by Prussia for the British and Belgian transit charge and hand-stamped '108' on face, taxed at 108 ore. Nice item.