Hello Scott, again !!! After reading your post again at this point my guess is that you may have a 6ft. or so "Knabe". They built a large number of pianos this size that had three bridges (three levels of wires) in rosewood art case. However there was one wing shaped piano that did indeed have four bridges. It was a small grand built by "Francis Bacon". Then there was the Sq. piano that was built in 1937 by Gulbransen that had five levels of wire. Neither of the latter were very good but the Knabe was a good piano and well worth rebuilding. The screw in damper wires offers very little problem. Let us know. Regards, Jack Wyatt
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