Scott 1501 mint sheet 8c (50) - Progress in Electronics, 1973 Commemorative Stamps. representative stamp imaged.
Scott 1501 mint sheet 8c (50) - Progress in Electronics, 1973 Commemorative Stamps. representative stamp imaged.
Scott 1501 mint sheet 8c (50) - Progress in Electronics, 1973 Commemorative Stamps. representative stamp imaged.