Watch List notes:

2 Chervontsa 1928 front and backside proof Specimen, P.199ds with red overprint "ОБРАЗЕЦ" at lower center and perforated Specimen number 2350 at upper left margin on the front proof and number 2357 on the backside, serial number ИМ246802 at upper center and ИМ135791 at lower margin. Slightly wavy paper with minor creases and tiny spots. Condition: XF+ (2 pcs.)