to clear BARCREST MPU4  usually to fit REAR OPENER FRUITS  & QUIZZES made during the 1980s with 'pecker' pay tubes.

can not be interchanged with later mpu4 17  pin type nor with mpu5 power units IDEALLY COLLECT ONLY VERY HEAVY / CHEAP

Casings may have light surface rust patches.

these may work fine but stood a while the capacitors may be weakened with age but good for spares or repair - suit collector/restorer. 

Buy now price is for TWO UNITS various makes.

collect in person as they are heavy costing high postage ......  and needing substantial box