Nathan Airchime 'M' Horn Patent 1950 R.E Swanson

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Hron Bowler Australia
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Nathan Airchime 'M' Horn Patent 1950 R.E Swanson

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Nathan Airchime Modulus 'M' horn patent. Filed 1950 by Robert. E. Swanson of Airchime.
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US2658470 m horn mechanism.pdf
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