Leilão Bidspirit | 1851 stampless cover from Darjeling

1851 stampless cover from Darjeling to Cambridge, England via Calcutta & Southampton - 1851 stampless cover from Darjeling to Cambridge, England via Calcutta & Southampton having red boxed ''INDIA PAID'' & ''PAID/1851/23 AU 23/F N” in circle on front and ”CALCUTTA / GPO / ***” & ”DARJELING” 25/6/51 9as red pmks on reverse