According to the book Hilborne and Frank Roosevelt by David H. Fox, the organ replaced an instrument enlarged by Hall & Labagh in 1872. The Roosevelt was replaced by an Austin in 1917 retaining the casework and some pipework. The side towers were removed in 1935. The Austin was replaced by a Schlicker in 1969.

This entry describes an original installation of a new pipe organ.
Identified by Steven Bartley, citing information from this publication: Wilkes-Barre Times Leader 4/1/1890 pg1 ; Dec. 8, 1893 pg. 8; early 20th century booklet of Baltimore industries shows some photos of Adam Steins organs, including the Wilkes-Barre organ. Lengthy article about the new organ at 1st Pres Wilkes-Barre PA. Built by Roosevelt, Stands in arch behind pulpit, 31' tall, 31.5' wide, 15 deep. Keyboards project from on end of case. All stops full compass, Sw= 10 stops, Some Great & Choir stops are enclosed in Choir box, 25 of the 30 stops are enclosed. Key & Stop action are mechanical (using stops and squares) (The non technical explanation of the windchest, indicates its a pneumatic ventil chest) The second article (1893) describes additional stops added by Adam Stein. Included- Swell Vox Humana & Aeoline; Choir Quintadena; Great Mixture. The cost of the Vox Humana, it says was $450.