Dear Ed,  I noticed your Robert Morton comment.  Art Reblitz and I are
gathering info for a new book and will include small (not built-in or
theatre size) organs with roll players, by Operators (Reproduco),
Seeburg, Nelson-Wiggen, American Photo Player Co., etc.  We have no
information on the organ you describe, and if you have specifics to
share we would be grateful.  I do not have any MacKinnon catalogues.

Also, we can use any brochures or specific info on the Seeburg Home
Organ (HO) and Residence Organ, which launched after the Celesta DeLuxe
(1926).

All good wishes,
Dave Bowers