C37, CSS AM45b, 1940-41 - Hong Kong Airmails, 90c, narrow type, unwatermarked, block of (25) 5x5, cracked left airplane wing in position 14 of block, with printer's imprint and accounting number (2 images)

C37, CSS AM45b, 1940-41 - Hong Kong Airmails, 90c, narrow type, unwatermarked, block of (25) 5x5, cracked left airplane wing in position 14 of block, with printer's imprint and accounting number (2 images)