W. W. Kimball Co.
1921

Diaphone was installed in the Asbury Park Convention Hall organ as part of its expansion to 17 ranks by Garden State Theatre Organ Society members. Fro their website:
"The Diaphone is from a 1921 3/15 Kimball in the Arcadia Theatre (510 N. Market Street Wilmington, DE) which seated
1305."

"The Arcadia Theater opened March 11, 1921 when a Kimball organ size 3/15 was installed. The Arcadia Theater was operated by Warner Bros. Circuit Management in the 1940’s. It was closed on May 17, 1956 with Bill Haley in “Rock Around the Clock” & Neville Brand in “Fury at Gunsight Pass”. It was purchased by the Historical Society of Delaware and was demolished in 1965 to build their Delaware History Museum."
-- Cinema Tresures website