Hello Mike. The piano you speak of could be one of three (or more) that were built by Wurlitzer. One is a 3ft.10 in. 73 note wing shape. The reg. butterfly grand has 88 note. Another is a "Student Butterfly" grand. This one is 2ft. 4in. long. It has 44 full-size keys, single escapement action with 35 dampers but no pedals. This piano has all two string unisons with the first 6 being wrapped. Ser. # is stamped on soundboard near the front, treble side. The numbers were in the 167- - - range. They were built in 1935, 36, 37 appx. The tuning pins are standard. I am in the market for a "Student - Butterfly". Hope this helps. Jack Wyatt
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