The pipe organ in First Parish Church in Lexington was built in 1897 and installed in 1898 by George Hutchings of Boston. In 1962 the present organ was tonally revised by the Andover Organ Company and in 1972 it was mechanically restored by Thad Outerbridge. It is now a versatile and completely reliable instrument used to lead the congregational singing, to perform great organ music of all periods, to accompany the choir, and to take part in performances of special instrumental music. The instrument has twenty-six stops distributed over three manuals and pedal. Manual action and stop action are mechanical, and pedal action is electro-pneumatic.
Wind pressure is three inches throughout.
Sixteen of the twenty-seven pipes standing in the front of the organ serve as part of the bass for the Great Open Diapason. The other eleven front pipes are purely for show, to make the design symmetrical and to fill the space. Behind the visible pipes are an additional 1880 pipes. This organ has 26 voices, plus mixtures and pedal extensions. The deepest pedal tone is provided by a wooden pipe 16 feet long and 15 inches square.