Description

Introduced in 1993, the Apple Desktop Bus Mouse II was the last ADB mouse model. On the outside they look the same, but I have identified 4 versions over their long life. No parts except the 7/8” mouse ball are interchangeable between them.

1) Made in Taiwan. These have black mouse balls. Manufactured by Logitech. Black ball cage. The mouse “tail” or cable is removable. The two screws holding it together are underneath the label. Ball retainer has no hole, and has 2 plain tabs on the underside.
Top case: 400791 w/400792 button. Bottom case: 400793. Retainer: 400685. Controller board: 200343.

2) Made in China. Gray mouse ball. The only one with a stamped label, although the single screw is underneath the serial number sticker at the bottom. 2 piece controller board uses a Logitech chip. No ball cage, it is part of the base. The rollers stay in the base. The mouse “tail” or cable is removable. Ball retainer has a hole at the bottom and two stepped tabs with a hole in each. Top case: 400902 w/401007 button. Bottom case: 401006. Retainer: 400905. Controller board: 201002.

3) Made in Malaysia. Version A. Gray mouse ball. Manufactured by Mitsumi. Black ball cage is held in by 2 screws. The mouse “tail” or cable is NOT removable. The two screws holding it together are underneath the label. Ball retainer has no hole, and has 2 split tabs on the underside.
Top case: 64-3161 w/64-3162 button. Bottom case: 64-3160. Retainer: 64-3163.

4) Made in Malaysia. Version B. Gray mouse ball. Manufactured by Mitsumi. No ball cage, it is part of the base. The rollers stay in the bottom case. The mouse “tail” or cable is NOT removable. The two screws holding it together are underneath the label. Ball retainer has a hole on one side, and has 2 tabs w/oval holes on the underside.
Top case: 64-4475 w/64-4476 button. Bottom case: 64-4474. Retainer: 64-4690.

Parts Available:

Mouse ball retainer
Mouse ball, black 7/8” (21.8mm)
Mouse ball, gray 7/8” (21.8mm)
Screws, case
Mouse bottom case *with teflon strips if possible
Mouse bottom case w/rollers
Mouse top case with attached “button”
Cable
Board
Board assy w/cable
Board screws
Teflon, front
Teflon, rear

The mice used for parts do not work at all, the cable is damaged, the cursor is very jumpy, or the click is funky or may not click at all. Some labels on the bottom case will have a hole in them to get to the screw, or the label may be missing.