Bootleg Space Invaders 3-layer board stack (Monochrome)

This 3-layer board stack is an exact copy of the Taito monochrome 3-layer board stack.
IV-001-MEM
ROM Board
IV-001-MEM ROM Board Front
This bootleg board is an exact copy of the taito board AA017749.
IV-001-CPU
CPU Board
IV-001-CPU CPU Board Front
This bootleg board is an exact copy of the taito board AA017750.
IV-001-IO
Sound, IO and Shifter Board (25S10)
IV-001-IO Sound Board Front
This bootleg board is an exact copy of the taito board TV070001A.