

Over the decades, the designs of the pianos were altered to the extent that they had little in common with the "classic" Mason & Hamlin pianos of the pre-Depression era. The company changed hands several times during the post-war era, becoming part of the Sohmer piano company in 1985. Piano manufacturing ceased in the United States in 1942 under authority of the War Production Board due to World War II, and Mason & Hamlin production shifted to military gliders. The company began sponsoring the Mason and Hamlin Prize piano competition. Mason & Hamlin, which had been at the former Hallet, Davis & Company piano factory in Neponset, Massachusetts, was moved to a separate plant at the Aeolian-American complex in East Rochester, New York. In 1932, American itself merged with Aeolian, consolidating the control of more than 20 brands of pianos in the Aeolian-American Company.

Mason & Hamlin's trademark, inventory, and equipment were sold to American's competitor Aeolian for $450,000 while the factory buildings were sold off separately by the end of the following year. Īmerican's sales began to decline in 1928 and collapsed after the stock market crash in late 1929. American positioned Mason & Hamlin as the "artist's brand" among the firm's premier lines, which also included Chickering and Sons ("family use") and Wm. In 1924, Cable sold its interest in Mason & Hamlin to the American Piano Company.

In my opinion, the Mason & Hamlin is a real work of art." It is not short of being a small orchestra. Composer Maurice Ravel said of Mason & Hamlin pianos, "While preserving all the qualities of the percussion instrument, the Mason & Hamlin pianoforte also serves magnificently the composer's concept by its extensive range in dynamics, as well as quality of tone. The most illustrious concert artists of the day aligned themselves with piano manufacturers Sergei Rachmaninoff used a Mason & Hamlin to make his 1924 recording of his Second Piano Concerto.
1940 MASON AND HAMLIN MODEL A FULL
The Cable Company, a Chicago piano manufacturing company, purchased the majority interest in Mason & Hamlin in 1904, when the Golden Age of the Piano was in full force. The firm advertises that it is currently used in all Mason & Hamlin pianos.

This was first included in their grands in 1900. Gertz was elected secretary of the company in 1903, and president in 1906, and had patented the company's Tension Resonator, a device fastened to the perimeter of the wooden structure of pianos meant to prevent their sounding boards from flattening. Gertz, an independent piano designer from Germany who had created new scales for them earlier that year. In 1895, the piano department was completely reorganized by Richard W. Initially they built only upright pianos featuring a patented method of tuning and maintaining string tension which they marketed as the screw stringer and intended as an improvement over the traditional system with tuning pins. Mason & Hamlin began manufacturing pianos in 1883. Mason & Hamlin supplied organs to several prominent composers, notably Franz Liszt, whose name the company applied to their patented selective sustain mechanism for organs comparable to the sostenuto in pianos. By the early 1870s they were considered the largest and most important manufacturer of reed organs, employing about 500 and producing as many as 200 instruments a week. This design placed the bellows vertically and underneath the reeds, and served as the model for the suction operated American-style reed organ. They originally manufactured only melodeons, but in 1855 introduced the organ-harmonium or flat-topped cabinet organ. Mason & Hamlin was founded in Boston, Massachusetts in 1854 by Henry Mason, son of Lowell Mason, the American hymn composer and musical educator, and Emmons Hamlin, a mechanic and inventor who had worked for melodeon makers Prince & Co.
