1968 Hemisfair '68 - Plate Block Of 4 6c Postage Stamps - MNH, OG - Scott 1340 - CX295
1968 Hemisfair '68 - Single 6c Postage Stamp - MNH, OG - Scott 1340 - CX295
1968 Henry Ford Single 12c Postage Stamp - MNH, OG - Scott 1286a
1969 John Wesley Powell - 1869 Expedition - Single 6c Postage Stamp - Scott 1374 - MNH,OG
1969 John Wesley Powell Plate Block Of 4 6c Postage Stamps - MNH, OG -Scott 1374 - CX359
1972 Osteopathic Medicine Block of 4 8c Postage Stamps - MNH, OG - Scott 1469
1972 Osteopathic Medicine Single 8c Postage Stamp - Scott 1469 - MNH,OG
1973 Marconi Coil Progress in Electronics Single 6c Postage Stamp - Scott 1500 - MNH,OG
1973 Progress In Electronics Plate Block of 4 6c Postage Stamps - MNH, OG - Scott 1500
1973 Progress In Electronics Plate Block Of 4 8c Postage Stamps - Scott 1501 - MNH, OG - CX561
1973 Progress In Electronics Single 8c Postage Stamp - Scott 1501 - MNH, OG - CX561
1973, Electronics Progress, Plate Block of 4 11c Airmail Postage Stamps - Scott C86 - MNH,OG
1974 Space Skylab Plate Block Of 4 10c Postage Stamps - Scott 1529 - MNH, OG - CX480
1974 Space Skylab Single 10c Postage Stamp - Scott 1529 - MNH - CW486a
1975 Space Apollo Soyuz Block of 4 10c Postage Stamps - MNH, OG - Scott 1569
1975 Space Apollo-Soyuz (Russia) Pair - Scott# -1569-1570 - MNH, OG - CX665
1976 Alexander Graham Bell Plate Block of 4 13c Postage Stamps - MNH, OG - Scott 1683
1976 Alexander Graham Bell Sigle 13c Postage Stamp - Scott 1683 - MNH,OG
1976 Chemistry Plate Block of 4 13c Postage Stamps - MNH, OG - Scott 1685
1976 Chemistry Single 13c Postage Stamp - MNH, OG - Scott 1685
1976 Clara Maass - Malaria - Block Of 4 13c Postage Stamps - Scott 1699 - MNH, OG - CT43a
1976 Clara Maass Block Of 6 13c Postage Stamps - Scott 1699 - MNH, OG - CT43b
1977 Centennial Of Sound Recording Plate Block Of 4 13c Postage Stamps - MNH, OG - Scott 1705 - CX341
1977 Talking Pictures Anniversary Plate Block Of 4 13c Postage Stamps - MNH, OG - Scott 1727 - CX328
