Germany and Italy Declare War
on U.S. - 12/11/41. Dorothy Knapp hand-painted cachet, 2c Defense tied
by Washington D.C. Dec. 11, 1941 machine cancel, unaddressed, extremely
scarce, only the third we have seen (Image) 
MacArthur West Va. Post Office
4/15/42. Dorothy Knapp hand-painted multicolor cachet "Our Secret
Weapon - Defense Bonds and Stamps - American Buying Power", addressed to
Bartels and with seldom seen cartoon cachet, quite rare and probably
unique (Image) 
MacArthur West Va. Post Office
4/15/42. Dorothy Knapp hand-painted multicolor cachet "America's Answer
Production", addressed to Bartels, quite rare and probably unique (Image) 
MacArthur West Va. Post Office
4/15/42. Dorothy Knapp hand-painted multicolored cachet "It's Today's
Production That Counts", addressed to Bartels, quite rare and possibly
unique (Image) 
MacArthur West Va. Post Office
4/15/42. Dorothy Knapp hand-painted multicolored cachet "May Liberty's
Torch Shine Forever", addressed to Bartels, quite rare and probably
unique (Image) 
D-Day - 6/6/44. Dorothy
Knapp hand-painted multicolored cachet, 3c Win the War tied by Victory Vt.
Jun. 6, 1944 duplex cancel, exquisite detail, rare
(Image) 
V-E Day - 5/8/45.
Incredible and unique set of twelve different Dorothy Knapp hand-painted
multicolored cachets with Victory VT duplex cancels, each monarch-size
cover is franked with a Name Block from the Overrun Nations series
(909-920)A FANTASTIC SET OF V-E DAY DOROTHY KNAPP COVERS. ONE OF THE MOST IMPORTANT WORLD WAR II SETS WE HAVE EVER OFFERED.
Addressed to and serviced by Butterfield, they were sent directly to Dorothy Knapp from Butterfield in order to create this one-of-a-kind set. (Image)