Rail Road and TPO Markings. 1898, cover addressed to Nizny Tagil Metallurgical Works, posted in the mail at TPO ''Veretia - Chusovaya'' of Lunyevskaya Branch Line (Gornozavodskaya Rail Road), franked on reverse by 7k blue, postmarked on arrival, mostly VF and rare, Est. $200-$300 (Image)

Rail Road and TPO Markings. ST. PETERSBURG NUMBERED TRAINS - POSTAL HISTORY GROUP: 1889-98, five postal stationery cards of 3k red, sent from St. Petersburg to Tsarskoye Selo (3), Oranienbaum or Kronstadt, each one bearing red circular TPO handstamp from ''1 Poezd (Train)''(2) to ''4 Poezd'' and all appropriate markings, neatly arranged on album pages, mostly VF, Est. $200-$300 (Image)

Rail Road and TPO Markings. MOSCOW UNNUMBERED TPO POSTAL HISTORY ITEMS ON EXHIBITION PAGES: 1914-16, one cover representing TPO marking ''Golitsino - Moscow'', which is unrecorded until now and very rare, three postcards representing TPO markings ''Moscow - Ramenskoye'', ''Ramenskoye - Moscow'' of 1914-15 and ''Sergievo - Moscow'' of 1916, fresh, mostly VF and rarely offered TPO items, Est. $$600 -$800 (Image)