Commodore™ 4064 - Serialno. :00071
Monochrome screen / keycaps 1-8 without colors:
Game cartridges - no grey shades, no random values because of missing SID:
Special 4064-kernal ROM, monochrome video adapter-board:
Early Rev. A board without RF-modulator, SID and color RAM - colors are patched to +5V at the 4066 footprint:
Video-board with H/V-sync separation-circuit:
