1935 underpaid cover sent to St. James with a ¼d cancelled G.P.O. BARBADOS MR 6 35. The cover was sent unsealed at a ½d rate, so by only paying a ¼d the double deficiency would have been a ½d. This was paid by a postage due being affixed and cancelled on arrival. A St James datestamp is on the back of the cover. Uncommon.