My Apple ][ (added to my collection in 2014)

• 6502 CPU at 1Mhz
• 48k RAM
• Lower SN likely 1978/1979 case with mid 1980 motherboard, so it seems to be a mismatch
• Dual voltage Astec power supply, also possibly a mismatch to the case
• Early “Rainbow cable” Disk ][ drive
• Hayes Micromodem II 300baud modem
• Period correct (1977) B&W CCTV monitor

While this system is a mismatch, it’s an old mismatch, likely repaired back in the early 80s with a newer logic board.