Wim, No, they say that dimension is 5 1/8 inch. But on the old Steinways, that may not be the case either. It might be anything from 5 inches to 5 1/4 inches. There were lots of dimensional variations in those old pianos, and each one just got fitted up so that everything would work. Your best bet is just to put everything in it's proper place, and then use the shank length that will put #88 right where it needs to be. Even then, that might not hold true for all of them, but #88 will be on the end that's critical. Jim Ellis
This PTG archive page provided courtesy of Moy Piano Service, LLC