Auction #93 Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World

1920, money order for 3,000 rub sent from Kovel (Volyn Gub.) to Saratov Gub., franked by vertical pair and a single of violet trident overprint (Kyiv, type 2) and cancelled by Field Post Office No.69 ''3.09.20'' ds, arrival marking ''21.9.20'' is on reverse, mounted on page from a Collection, VF and rare late usage, Est. $300-$400