Serial no.97655, fromabout 1880).
The stops are (from left to right):

Sub Bass
Melodia
Viola
I Forte
II Forte
Vox Jubilante
Flute
Diapason
Harmonic

The keyboard is 5 octaves, F to F with the split two octaves from the bottom.

Company history:
Estey, J., & Co., Brattleboro VT 1863 - 1872. In 1869 a new factory was started on Birge Street at the Dickenson Farm, later called Esteyville. Reorganized as Estey Organ Co. in 1872 and as the Estey Corporation in the early 1930's, closed in 1959.