Los 6241
1875, Unpaid small letter dated Horten (Norway) August 23rd 1875 and sent to Stockholm. Struck with postage due charge mark "25 öre" (type 2, PKXP 7 NED). Transit cancels: "BUREAU P....EGIANT CHRISTIANIA 24 8 1875" and "PKXP. No 19. 24 8 1875". Franked with 5+20 öre postage due adhesives corresponding to 25 öre, cancelled August 25th 1875. Norway and Sweden were both members of the GPU from its formation. However, the GPU treaty made it possible to continue with earlier bilateral agreements. Thus the Postal Agreement of November 29th 1873 between Norway and Sweden, which specified an unpaid rate of 25 öre, was still applicable. The combination of a handstruck charge mark and postage due adhesives is very rare.