Bidspirit auction | 1878 1/2 Anna Blue QV

1878 1/2 Anna Blue QV PS registered from Calcutta with boxed registration mark inscribed ”O.CALCUTTA.W ” within the box and addressed to Lucknow with Postage Due Mark, an unusual usage with registered mail. Backstamped with E.I. 2a orange (2) ,tied with C-E17 Cancellation with sender's private seal, dely and transit cds as well as ”CALCUTTA W.” despatch cds on reverse.