Here is a complete sheet of 40 airmail labels issued by B.S.A.A. One strip on the right side of the sheet is printed in dark violet-blue color as rest of the sheet is in dark-blue.
Year: 1948, Gummed. Günter Mair's catalogue no: - ARG-B-11, rouletted, sheets of 40(5x8), dark blue or
dark violet-blue/light blue/white, 4****