Acccording to the 'History of Trinity's Organs' on the church website (viewed 2021-11-24): "1846-50: A Metz Organ was installed at Trinity Lutheran Church when it was first located at 3rd & Lombard. The Metz organ was a 1 manual, tracker organ. The Metz organ was sold when Trinity relocated and needed a larger organ. The Metz organ still exists and is located at San Salvator Lutheran Church in Venedy, IL."

'Though the builder of this instrument is not known for certain, internal evidence suggests that it is the work of J. G. Pfeffer, and it appears to date from 1865. The projecting keydesk and the action date from the 1904 Kilgen rebuild, which was undertaken to "modernize" the organ, according to church records. Originally, the instrument had folding doors covering a recessed keydesk. The organ case and frame are designed to accept a second division, but there are no signs that the organ has ever had more than one division. A plywood top was installed over the case in the 1975 renovation. An unpublished dissertation on the organ has been written by Richard Haas. According to The Organ Handbook by Hans Klotz, published by Concordia Publishing House, St. Louis, in 1969, " ... the 'Calcant' (Kalkantenruf) ... signals to the person in charge of treadling or cocking the bellows ..." ' -- from 1979 OHS Handbook*

Updated through online information from Martin Ott.

Attributed to J. G. Pfeffer, but appears to be older.

Relocated from Trinity Lutheran, 4th Street, St. Louis c. 1865. Rebuilt by Geo. Kilgen & Son 1904; Restored by Martin Ott 1975.