Updated by William Dunklin, naming this as the source of information: a vintage postcard.
Postcards from 1911 and 1913 have surfaced showing that Moller either replaced their older organ with a new instrument, or perhaps incorporated parts of the existing into a new organ. Comparing the two images, taken only 2 years apart are conclusive that both show the same room though there have been changes to the decoration, lighting, and of course, the organ.
Identified through information in List of More than 5200 Moller Pipe Organs (Hagerstown, Maryland. M. P. Möller, 1928).