Auction 333-341 Nigeria, Cameroon, Sudan & Worldwide Postal History - Day 4

1866/68: Belgrade printing 20 pa. red on pelure paper used in combination with 40 pa. ultramarine in a horizontal pair on pelure paying the registration on 1868 cover to Belgrade, all tied by oval framed "Naplaceno" handstamps in black with straight line "Preporucen" handstamp above and CUPRIA despatch cds (Jan 25) at right. Reverse with Belgrade arrival (Jan 27) in blue. Somewhat typical aging stain around perforations but a very rare and not unattractive registered usage.