It appears that the *Colt Clavier Collection*, one of the largest private
collections of historical keyboard instruments, seems to be auctioned off:
Harpsichords and mainly early pianos


http://www.thecanterburyauctiongalleries.com/sales/fine-art-antiques/fa070618/

The exact number of instruments to be auctioned is 114 (some instruments
had already been sold earlier).


The Rädecker & Lunau square piano no. 2909 is by the way most likely
wrongly dated by ca. 20 years, 1820s instead of most likely 1840s ... (I
hope that the descriptions of other instruments are in generally more to
the present standard of knowledge).


Best

Ibo

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