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

1858/1923: Group of 9 covers including 20 kop. issue 1858 to prominent address 'Antoni Potocki' from Warsaw to Tomaszpol, also a 10 kop. cover same issue from KOZLOW to Moscow; 1 cover with revolution overprint on Romanov 1917 (10 kop. stamp in block of 4), 3 registered censored covers from Koungour 1918, an envelope with revenue stamp mixed with regular stamps registered as local use, a cover with 250 rub. + a pair of postal-saving stamps 1 kop., 2 covers from Agricultural exhibition 1923 each one with full set.