These are probably the harder ScrollPoint Pros to find, but also some of the least desirable due to their 400 DPI ball mechanism. The models for both mice are the same, however the part number varies depending on which colour you get. David Hill (the industrial designer of the mouse) remarked: 'The new IBM ScrollPoint Pro Mouse demonstrates design innovation and the evolution of the mouse from computer equipment to high-tech, functional art. Model: MO18B (ScrollPoint Pro) Part # 33元246 Antoque Sage / Part # 33元247 Slate Blue This ScrollPoint Pro (can also be referred to as the revision 1 'ball' styled ScrollPoint Pros) was released in 2000 of February with the retail price of $39.95. They were paired with the earlier IBM wireless keyboard. Here's a photo comparing both slate blue colours and a metallic black: Model RO070 (ScrollPoint II Wireless) Based on model MO09K, these ScrollPoint mice are slightly elongated to compensate for the wireless circuitry. It appears there have been two manufacturers for the Slate Blue plastic bezels as the colour can vary from being more blue or purple. The revisions are colour specific: IBM never offered both colours for both revisions- Slate Blue colours common during the NetVista series.
The next important thing is that the Slate Blue ScrollPoints do have a slightly slower cursor (seems to be firmware-related) BUT they are able to work with transparent surfaces (glass, clear plastic, etc). I'm not sure why IBM made these mice more expensive to manufacture as time went on (perhaps to make it easier to repair as they carried a 1 year on-site warranty or someone internally at IBM wanted to make it easier for people to mod them- unlikely). Obviously it's more expensive to include a detachable connector so. First and foremost, it's interesting the earlier IBM mouse lacked a detachable USB cable- and all of the sudden in the later models they implement this (which is helpful when you have to disassemble these mice en-masse).
'Revision A' (Slate Blue ).Optical sensor IC: H2000 B0304.Soldered-down internal mouse cable.extra unused resistor pad (R5).Board model: 90-1.ScrollPoint PCB: '6'.Mouse has slower cursor sensitivity, increased ScrollPoint sensitivity.Mouse CAN track transparent surfaces! 'Revision B' (metallic black).Optical sensor IC: A2051 A0316.Detachable internal mouse cable.extra unused capacitor pad (C2).Board model: 80-0.ScrollPoint PCB: '4'.Mouse has faster cursor sensitivity, decreased ScrollPoint sensitivity.Mouse CANNOT track transparent surfaces I have a few comments about the revision differences.
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