There is a slight possibility that it was the 22nd piano made in 1943.
Imagine - Pierce didn't help!?!?
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If you find old references or links on this site to pianogen.org, they should refer to pianohistory.info
Ah, but Eizenham did give me a laugh though...so it does have its uses apart from standing my sarnies on in the car!
Looked very like a tiny Cramer I tuned once but looks older than 1943.