全民义务植树运动十週年纪念币。样币。全民义务植树运动十週年纪念币,3枚一圆一组,背面有"样币"字样,置于绿色盒中。UNCIRCULATED.CHINA. Three Piece Specimen Set, 1991.cf.KM-338-340. Three 1 Yuan Specimen coins commemorating the "Planting Trees Festival". Each piece has the added characters for "Specimen" on the reverse design. Housed in a green plastic display case.