Crescent - Model M-2000/M-3000 - Magne Recorder - Original Service Manual - 1951

Crescent - Model H-2A! Series - Wire Recorder - Original Service Manual - 1951

Sonograph- Model BL100 - Wire Recorder - Original Service Manual - 1951

Sonograph - Model BL100 - Wire Recorder - Original Service Manual - 1951

Crescent - Model M-2000/M-3000 - Recorder - Original Service Manual - 1951

Ampro - Model 730 - Tape Recorder - Original Service Manual - 1951

Eicor - Model 15 - Tape Recorder - Original Service Manual - 1951

Silvertone - Model 72 - Disc Recorder - Original Service Manual - 1951