Beethoven's Piano for may science project?

I am asking this question purely for scientific purposes. How many keys did Beethoven's piano have and what brand name of piano did he prefer?

MissLimLam2009-11-24T12:59:29Z

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I was wondering why you asked this - but I see that its in the rock and pop section. Shall I confuse them more by saying he had a Steinway A, with 96 keys?