1963 GIBSON DISCOVERER VALVE AMP. A 1963 made Gibson Discoverer in very good condition with brown textured tolex and original Jensen 12 inch speaker. The 10 watt amp has a faceplate that features a logo of the Discoverer satellite making it very much of the time. Height is 16 inches by 20 inches wide and 8 inches deep. Clear plastic handle is still functional and comes with its original amp cover. Sounds superb for its size.