File:Concord Stereophonic 440 tape recorder (16861050336).jpg - Wikimedia Commons

Concord reel tape recorders • the Museum of Magnetic Sound Recording

Reel to Reel Tape Recorder Manufacturers - Craig tape recorders- Museum of Magnetic Sound Recording

Concord Tape Reel Reel-to-Reel Tape Recorders for sale

Martin Theophilus of The Museum of Magnetic Sound Recording, Part Two – PS Audio

File:Concord Stereophonic 440 tape recorder - head assembly (16266959833). jpg - Wikimedia Commons

CONCORD Stereophonic 550 Tape Recorder Owned by Queens of the Stone Age #28023

Concord Stereophonic 444 Transistorized Reel To Reel Tape Recorder Pla

4444-Track Stereophonic 444 R-Player Concord Electronics

File:Concord Stereophonic 440 tape recorder - point-to-point wiring (16885966241).jpg - Wikimedia Commons

File:Concord Expedition and Patriot Messengers-fr.svg - Wikimedia Commons