Young Chang Expanding Action Bracket Problem

This is to show the expanding action bracket problem with grand pianos manufactured by Young Chang 1990 through 1999, serial numbers 53945 through 124306. Names on these pianos may include and of the following: Astor, Bechendorff, Cline, Essex, Ibach, Knabe, Nakamura, PianoDisc, Schafer & Sons, Wagner, Weber, Wurlitzer, and Young Chang.