India SG55 HALF ANNA In pale blue Imperf PROOF on thin paper

1869 (c.) 1/2a (die I) imperforate proof in pale blue (issued colour) on unwmkd paper Pair Fine and attractive. (N.B. Not to be confused with SG 37a. Plate proofs were taken from Plate IT (registered 19th Feb 1869) in pale blue and pale chalky blue.)