Up for sale is a historic, highly collectible lot of 12 vintage plug-in discrete component logic module cards dating from the mid-1960s to early-1970s. These were sourced from a former U.S. military service member's estate.This is a cohesive, matching sub-system featuring multiple circuit variations (including gate logic networks and transistor amplifier drivers) built with early black-hat germanium transistors, parallel glass switching diodes, and gold-plated edge contacts.A fascinating detail for military tech historians is that 11 of the 12 cards feature original, handwritten factory inspector or cabinet positioning codes directly on the copper traces, while one remains a pristine unmarked variant:
• F86 (Frame 86)
• F111 (Frame 111)
• F124 (Frame 124)
• F218 (Frame 218)
• F223 (Frame 223)
• F228 (Frame 228)
• 133
• 269
• 295
• 1120
• 2080
• [1 Blank / Unmarked Card]Perfect for computer history museums, vintage military electronics collectors, or DIY audio effects builders looking for an excellent haul of rare, salvageable vintage germanium components.Condition: Vintage, used condition. Missing/desoldered components on a few trace paths (please see photos). Sold strictly as-is, untested, as historic artifacts. Fast, secure shipping.