1924, tax stamp with black surcharge 3k on Insurance stamp of 3r red on green network, tied by seven-line official cachet (signed by Feodor Chuchin), used on reverse of registered philatelic exchange cover from Moscow to France, bearing 13 definitive stamps (block of ten on reverse), all appropriate markings and arrival ds, mostly VF (Image)

1927, two tax stamps with black surcharge 5k on Postal Charity stamp of 1+1k red and dark green, tied by seven- line official cachet, used on reverse of registered philatelic exchange cover from Kiev and Moscow to Germany, franked by Jubilee of October Revolution stamp of 28k brown on front, all appropriate markings and arrival ds, VF (Image)

1931, 5th (auxiliary) issue, inverted black overprint 10k over black surcharge 25k on 300r green, horizontal pair, usual rough perforation, full OG, NH, VF and rare in pair (guaranteed genuine) (Image)