L. W. Barnhart
1940

Updated by J. A. Hefner, listing this web site as a source of information: http://www.gallipolisgrace.com/church-history.html.
Mr. Barnhart's notes are available in more detail here: http://www.gallipolisgrace.com/church-history.html
The action was electrified - they added a new console and chimes [seemingly leaving the configuration the same otherwise].
Curiously enough, the parts used in the 1977 rebuild were from Organ Supply Company in Erie, PA, where Felgemaker was located.

Identified through on-line information from James R. Stettner. -- Mr. Barnhart assumed care of the instrument in 1941. His notes indicate that the organ still a tracker at the time he took over care, and it was electrified a few years later. Notes in the church history seem to suggest it was electrified "as is." The console was moved twice - once in the 1950s and again in the 1960s. The church suffered a fire on Monday, June 20, 1977. This partially damaged the organ, requiring new manual windchests, replacement of the facade pipes which included 1-17 of the Great 8' Open Diapason, a new Pedal regulator, and new bass for the Swell Open Diapason. A new II Mixture was added to the Great. The existing Pedal chest was retained and rebuilt. Source: church history.