Series 641 (August 31, 1965-October 21, 1968 printed by the BEP) Two sets like this one are in private hands. They are part of two progressive, composite, and specimen sets in private hands. Additionally, a similar set bound in a leatherette book is in private collections. All PCGS Graded: 5 Cents 66PPQ; 10 Cents 67PPQ; 25 Cents 67PPQ; 50 Cents 67PPQ; $1 66PPQ; $5 66PPQ; $10 65PPQ.，From the Paymaster Collection.
