Original, untested Taito Space Chaser arcade game circuit boardset from 1979.  Boardset includes the three boards as shown in good, used condition.  These boards are fairly clean, no signs of corrosion or repairs.  They are untested and have been sitting for many years.   We believe this is the same (or similar) hardware used on Taito's Space Invaders circuit boards. 

See photos for more details on its condition.