I have a 1913 Steinway M (baby grand) handed down in the family since it was originally purcfhased. Part of the family legend is that the piano was made by the 3 masters of each area of piano making- sound board, case and keyboard - at the Steinway factory at the time, and it does have signatures inside one of the keys. The local Steinway tuner has basically told me there is no such thing, but I think he is trying to buy the piano for a low ball price, if I ever do decide to sell.
Has anyone ever heard of a 3 masters signed piano?? or this a family myth?