A size comparison between the Logitech Cordless Trackman Optical, the Microsoft Trackball Optical, and the Elecom Huge, for if anyone is curious. : r/Trackballs
Logitech Cordless Optical TrackMan Review vs Logitech Cordless Trackman FX Optical - YouTube
Logitech Cordless TrackMan Wheel Stationary Mouse T-RA18 (with Receiver) for Sale in Tecumseh, MI - OfferUp
Logitech Cordless Trackman Wheel Ball Marble Mouse T-RA18 w/ USB Receiver Red | eBay