Kiev. 1922, black downward (inverted) surcharge 7500(r) on Saving stamp of 5k green on buff network, printed on paper with horizontal ''diamonds'' watermark (checked by our experts), block of four (upper right stamp has rounded corner) and horizontal pair, both are affixed on a piece along with RSFSR stamp, clear Kiev cancellation, VF and scarce, C.v. $2,640 as singles (Image)

Kiev. 1922, registered cover from Boguslav to Berlin via Moscow (Dr. Brender's correspondence), franked on reverse by upward surcharge 7500(r) on Saving stamp of 5k in block of four, Berlin arrival, minor soiling, F/VF and scarce real commercial cover, Raybaudi certificate (Image)