India: Short-Paid Air Letter

Air letter from Bangalore (21 NOV 50) to Portland, US, prepaid 8 As. Indian “T” handstamp, endorsed “23” (ctms) , US two-line handstamp “Postage Due … Cents / AMF Chicago, Ill.”, endorsed “8” (cents).

Country of Origin: 10 As was the aerogramme rate to US in 1950, so the aerogramme was short paid 2 As.  The exchange rate to UPU gold centimes was 3 As 6 pies = 20 ctms, with 1 As = 12 pies. Double the deficiency 4 As = 23 UPU ctms.

Country of Destination: 23 UPU ctms were converted into US currency at an exchange rate of 1 c = 3 ctms. The postage due, after rounding up, was 8 c.