The left and right hand stamps are part of a revenue series of 1933-34
according to Gibbons. The middle stamp is SG O13, cat. £8.50 this
year. According to Isnani, The Amirate of Bahawalpur, Postal History
& Stamps (1932-1949), 10,000 stamps were overprinted. According to
Isnani, the unoverprinted revenues also saw genuine postal service in
early 1945.