This is an actual memo from IBM in 1991 Abstract: Mouse Balls Available as FRU (Field Replacement Unit) Mouse balls are now available as FRU. Therefore, if a mo… | Ibm, Actual, Memo
IBM 2-BUTTON ROLLER BALL MOUSE #33G5430 VINTAGE IN GOOD CONDITION USED | eBay
IBM ScrollPoint II trackball mouse P/N 24P0484 | eBay