Sc 1770 Robert F Kennedy &  1771 Martin Luther King  . 15 Cent Stamp. Two Mr. Zip Blocks of 4 from 1979. MNH  Never Folded. No Perf. Separation. Have Fun With Stamps. Great For The Collector or For Mixing Up Your Mailing Postage.  Enjoy More Savings With Reduced Shipping Cost When You Purchase More Than One Item In The Same Order. The Blocks That You See Are The Blocks You Will Receive Count On That. Thanks For Looking!