Germany and German Colonies Germany Air Post Semi-Official stamps
Sale No: 90
Lot No:634
Symbol:** BL
Cat No:CL3
Air Post Semi-Official stamps. 1912, Rhine-Main Air Mail, 30pf deep green on pale gray paper, bottom right corner sheet margin block of four, full OG, NH, VF, C.v. $390++, Mi #III, €520++, Est. $150-$200 (Image)