Marshall Amps on Twitter: "The legendary @ChrisShiflett71 of @foofighters warming up backstage through a new Origin 20C. Happy Marshall Monday. #liveformusic https://t.co/i7S59bxuWj" / Twitter
Marshall Origin 20C, my first tube amp. : r/GuitarAmps
1967 20c Prominent Americans: George Catlett Marshall for sale at Mystic Stamp Company