Accuratus Track 900 - USB & PS/2 Large Button and Large Ball Trackball – Workspace Ergonomics
Help!] QTronix Libra 90M — can anyone help me confirm this trackball with a female DB9 connector is a PS2 mouse and not USB or Serial? Internal pics in comments: : r/Trackballs
Logitech Marble Mouse Corded Trackball PS2 Port Connector White with Red Ball | eBay
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Walfront Illuminated 4.5cm Round LED Trackball Mouse PS/2 PCB Connector, Wired USB Trackball for Arcade
4.5cm Illuminated Round Ps/2 Pcb Connector Arcade Led Trackball Mouse W/ Screws Fk