Original Ohio Scientific OSI 495 Circuit board

Reproduction Ohio Scientific OSI 540B Color Video Board Interface Challenger

7 Vintage Epsco marine Loran S100 type 1970s computer circuit boards, backplane

Reproduction Ohio Scientific OSI 400 "Superboard" 6502 CPU Board SBC

Vintage 1960's Computer Circuit Board - Philco Surface Barrier Transistors (SBT)

VINTAGE ORIGINAL PLASTIC CARD SEPERATORS FOR PDP-11 DEC DIGITAL

DEC System Building Block Module - 4106 Hex Inverters - 1964 (See Description)

1x Rare Vintage Cool Gold Lid Ceramic National Semiconductor MM1101D /Intel 1101