Sc:1438 Prevent Drug Abuse(6) & 1558 Collective Bargaining (8). 8 &10 cent stamps from 1971 & 1975. Two Great Large Plate Blocks. MNH. Never Folded, No Perf. Separation. This Can Be Collected Without issue Or Used To Mix Up Your Mailing Postage. Your Choice. Enjoy More Savings With Reduced Shipping Cost When You Buy More Than One Item In The Same Order. The PB's You See Are The PB's You Will Receive Count On That. Have Fun With Stamps  And Thanks For Looking!