Stoplist: Sliding Lever For Contrasting Piano & Forte Effects Compass from F to a''. Rectangular wooden case with double bellows. The bellows are divided diagonally by a thick wooden diaphragm into two chambers. The lower (left-hand) chamber serves as the primary bellows (feeder) and the upper (right-hand) chamber as a combined wind-chest and pressure increaser. The lower chamber has double flat steel spring; the upper chamber has a single flat steel spring. Two strip valves in the lower chamber, one strip valve in the upper chamber. The reed-frame serves as a cover for the upper chamber and the reed carrier. The reed are protected by two removable covers with slides for the contrasting forte and piano effects; the slides are moved by a sliding lever. The touches are round ivory buttons disposed in two rows: the one nearest the player has twenty-four touches and corresponds to the naturals on the piano; the second row, with a black circle on the top of each touch, has seventeen touches corresponding to the sharps. Between the touches there is a printed paper strip with the letters of the tones.  

Company History:

Abraham Prescott Co. ,
Concord, NH 1831 - 1845.
Began making lap organs in 1836
Renamed Abraham Prescott & Sons; Piano Co. in 1845.
The factory burned in 1896, and the company went out of business in 1912, ending the corporate life of one of the pioneers of the American reed organ industry.