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Logitech Mouseman Wheel, same era (maybe a tad newer than yours):
http://reviews.cnet.com/mice/mouseman-wheel-usb-4/1707-3148_7-197819.html
Logitech Mouseman Wheel, same era (maybe a tad newer than yours):
http://reviews.cnet.com/mice/mouseman-wheel-usb-4/1707-3148_7-197819.html