Updated through online information from Roman Lizak. -- I had the opportunity to see this little Möller artiste located in Hill Auditorium at the University of Michigan. It had a strange specification and there is no positive numbering throughout the instrument. I saw 9535, 9616, AR 270, and AR 264-6. I don’t know if some of those were shop reference numbers. I did a quick OHS Database search and 9616 appears to be the main opus for this instrument. This instrument is 3 ranks. Gedeckt (sounds like a Quintadena), Principal, and Nazard (which was replaced with a 2’ Flute of some sorts).
Identified from factory documents and publications courtesy of Stephen Schnurr.