USSR
"International Red Aid" (aka MOPR and The International Workers Aid society) was an international social service organization established by the Communist International in 1922.
| Country: | USSR |
| Type: | Postage stamps |
| Series: | 10th Anniversary of International Red Aid |
| Nominal: | 50 k |
| Year: | 1932 |
| Material: | ordinary |
| Size: | 26 x 37 mm |
| Perforation: | comb 12¼ x 11¾ |
| Mintage: | 200,000 |