From the book, "Steinway Regulation" by F. R. Dietz Models S-B Models C-D Point of hammer center from underside of string 4.6 cm 4.9 cm point of rep center 11.0 cm 11.3 cm blow 47 mm 49 mm dip 9.5 mm 10 mm underside of keytop from keybed 63 mm 65 mm -- Regards, Jon Page
This PTG archive page provided courtesy of Moy Piano Service, LLC