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vintage marble mouse the two button type. How do you scroll? I read press both buttons together but... : r/Trackballs
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Detail of a contemporary computer mouse with two buttons and a scroll wheel which can also act as a third button Stock Photo - Alamy
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Black Cabled Computer Mouse with Two Buttons and Scroll Wheel Stock Image - Image of motion, equipment: 107731449
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USB Wired Mouse - Two Buttons plus Wheel : ID 2025 : $7.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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ibm usb 2-button optical mouse features | IBM 40K9200 Two Button Optical Wheel Mouse, Black, USB ... | Ibm, Computer hardware store, Usb
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