DVR overprints. 1 kopek imperforate, 3 kopeks imperforate, 15 kopeks, 3 on 35 kopeks in vertical pair, 7 on 15 kopeks (2x) and 10 kopeks on 3,50 rubles imperforate on reverse of registered overfranked philatelic cover from Vladivostok 17-1-1921 via San Francisco to Omaha, Nebraska (USA), fine/very fine (roughly opened)