@JDW posted some interesting Apple TIL articles back on thread regarding the PowerBook 100 and 170. One of those articles refers to the 'low power' mouse and EMI shielding in a long ADB connector. I located one of those mice, but the cable was disconnected, so I wasn't confident it was really an original Portable mouse.
I found another mouse with the long ADB connector and low-power symbol. This time the mouse came with a Portable and the cable was intact. The long connector has the same part number (590-0513-A) as the earlier mouse that I found on its own.
Below is what the inside of the mouse looks like. This is consistent with black-ball mice of that period that have the short connector.
As second-hand collectors, we can almost never be sure of whether an accessory originally came with a particular Mac, or whether it was obtained separately and co-mingled. In this case, I have a theory that this mouse is indeed original to this Portable. The date code on the Logitech chip of 8946H (46th week of 1989) is the appropriate time period for a Portable with a 12th week of 1990 date code. More so, this Portable came with a numeric keypad instead of a trackball. The user would have needed a standalone mouse.
I believe I understand the meaning of most parts of the serial number for the black ball mice.
LT951HN2C22 =
LT = Logitech Taiwan
9 = 1989
51 = 51st week
HN2 = numbers and digits to represent for the unique mouse # for that week
C22 = mouse with 22 mm ball (C25 appears on the long serial numbers for the gray 25 mm balls)
I base this on the other black-ball mice that I have and their Logitech chip date code:
Chip Serial Number
8946H LT 9 51 HN2 C22
9005H LT 0 11 02E C22
9101H LT 1 05 8FR C22
9111H LT 1 20 N8M C22
9218H LT 2 25 APR C22
- David
I found another mouse with the long ADB connector and low-power symbol. This time the mouse came with a Portable and the cable was intact. The long connector has the same part number (590-0513-A) as the earlier mouse that I found on its own.
Below is what the inside of the mouse looks like. This is consistent with black-ball mice of that period that have the short connector.
As second-hand collectors, we can almost never be sure of whether an accessory originally came with a particular Mac, or whether it was obtained separately and co-mingled. In this case, I have a theory that this mouse is indeed original to this Portable. The date code on the Logitech chip of 8946H (46th week of 1989) is the appropriate time period for a Portable with a 12th week of 1990 date code. More so, this Portable came with a numeric keypad instead of a trackball. The user would have needed a standalone mouse.
I believe I understand the meaning of most parts of the serial number for the black ball mice.
LT951HN2C22 =
LT = Logitech Taiwan
9 = 1989
51 = 51st week
HN2 = numbers and digits to represent for the unique mouse # for that week
C22 = mouse with 22 mm ball (C25 appears on the long serial numbers for the gray 25 mm balls)
I base this on the other black-ball mice that I have and their Logitech chip date code:
Chip Serial Number
8946H LT 9 51 HN2 C22
9005H LT 0 11 02E C22
9101H LT 1 05 8FR C22
9111H LT 1 20 N8M C22
9218H LT 2 25 APR C22
- David
