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THE PERIOD PIANO COLLECTION

     A 501(c)3 Non-Profit Corporation    email contact    Donations

        Bill Shull, RPT, M.Mus.  Founder and President

       610 Amigos Dr B1,  Redlands, CA  92373  909 796-4226     PERIOD PIANO CENTER SINCE 2006

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Steinway Vertical 40731 with Patent Resonator

ALL SITE LINKS

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Steinway 40731 Plan view4
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Above is the remaining Patent Resonator system, soon discontinued, as the high treble soundboard can be “levered” for slight crown and impedence increase. 

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Above is a bolt-on hardware device for duplex scaling

Broadwood Square 8
Chickering Cocked Hat 22199 3 compr doc