Pianotech

  • 1.  Mason And Hamlin key pins

    Registered Piano Technician
    Posted 05-14-2026 13:39
    For anyone who’s interested:

    1998 BB
    Balance rail pins 0.146 (measured most at closer to (0.147)

    Front rail pins 0.131 (all measured 0.130, assuming this is manufacturing tolerance, since 0.131 is a common size)


    Joe Wiencek