HP DY651A USB Optical 3-Button Mouse £65.00 - PicClick UK
HP DY651A USB Optical 3-Button CAD Mouse £32.99 - PicClick UK
What is a good optical mouse, with 3 real mouse buttons? I.e. I don't want the scroll wheel to be the middle button, I want a real button there. - Quora
NEW HP USB Mouse 3 Button Optical Mouse with Scroll-Wheel Travel Mouse £11.99 - PicClick UK
DY651A: HPI USB Optical 3-button Mouse | Convena.com