Indian Convention States. (Nabha State - United States). 1928. Nabha State postal stationery envelope 'One Anna' brown upgraded with Nabha SG 40a, 2a mauve (stamp and stationery invalid), back-stamped 'Nabha State '1st July 28' with framed 'Nabha State/ Postage Due/ Annas' on face, addressed to New York with hand-struck 'T' and circular 'New York N.Y. G.P.O./ Due 10 Cents' on face with United States postage due SG D534, 10c carmine applied and tied in New York. Very attractive item and scarce usage.