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  1. Calibration Book MC-177-N For Frequency Meter BC-221-N Serial No 2713

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  2. Army Signal Corps Frequency Meter BC-221-T Zenith Radio Corp.

    Completo di cuffie e cavetteria. NON testato! dario.e non solo collectibles.

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  3. Calibration Book MC-177-N For Frequency Meter BC-221-N Serial No 4113

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  4. Calibration Book MC-177-C For Frequency Meter BC-221-C Serial No 209 Metal Cover

    The "Calibration Book MC-177-C For Frequency Meter BC-221-C Serial No 209" is an original English-language book with a metal cover. It pertains to the electrical topic in the field of science and medicine. The book is specifically designed for the frequency meter BC-221-C with serial number 209. 5.25x5.75x.5 & under 8 oz.

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  5. Vintage US Army -Signal Corps - Frequency Meter, Manuals - BC-221-T

    Up for sale is a very cool Frequency Meter. This dates from the 1940s, so was probably used in WW2 and probably Korea. This was surplused at some point. Unsure of working condition! Good display piece! If you have any questions please feel free to contact me at any time!

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  6. Vintage Calibration Book MC-177-AA for Frequency Meter BC-221-AA. Philco Corp.

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  7. 3 FREQUENCY METER Vtg CALIBRATION BOOKS CRR-74028 MC-177-T BC-221-T AN/URM-32A

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  8. Zenith Mc-177-T Calibration Book Frequency Meter BC-221-T W/ Metal Cover

    Zenith Mc-177-T Calibration Book For Frequency Meter BC-221-T With heavy duty Metal Covers Used condition Vintage Pages are yellow from age. Not dated

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