C50, AM87, May 2, 1946, Chinese National Currency Airmail Surcharges $73 on 25c, block of 20 (4x5) with bottom selvage printer's imprint and plate number BB1.10

C50, AM87, May 2, 1946, Chinese National Currency Airmail Surcharges $73 on 25c, block of 20 (4x5) with bottom selvage printer's imprint and plate number BB1.10