Genuine AppleMacintoshM0001 128K or Mac 512K brightness control knob. Replace your missing or damaged knob with thisgenuine Apple part from a 1984 Mac. This installs from the inside of the Mac, so Mac must first be opened and disassembled to access this part. No returns of refunds, only buy if this is the exact part needed. All photos of exact item buyer will receive.Will be well packaged to protect in shipment.

Please visit my store80\'s Macs and Gamesfor many more early Apple and Mac collectibles.