Does anyone have an idea how you might describe the large Aeola?
To get a complete button count, I would need to see the other side. 38 buttons on the visible left hand end. The same or nearly the same on the other end would give it a 5½-octave range. The end is a bit larger* than my 56-button bass Aeola, which leads me to suspect that the bottom note is "cello C" (2 octaves below middle C), or maybe even lower.
The configuration of the lower buttons adds a constraint, but it doesn't remove all ambiguity. E.g., it matches the configuration of a standard treble, standard baritone, tenor-treble, etc., but not a standard "bass" (like mine mentioned above). This suggests that either it's a bass-baritone (laid out like a tenor-treble, but sounding an octave lower for the same fingering) or a "G-bass" (laid out like a treble, but sounding 2 octaves lower for the same fingering). I'm inclined to favor the bass-baritone, since I expect the G-bass variant would have to be even bigger than that instrument appears. (In comparison to my 56-button bass, the added size might be attributed entirely to the additional 1½ octaves of range. Even though those would be higher, smaller reeds, there would be nearly 50 of them.)
* Exactly how much larger, I'm not sure, since I measured with my fingers, not a vernier. (10"? 10½"? My bass is 9½" across the flats.) I compared the distance from the edge to the finger plate with the distance across the array of buttons.
Edited by JimLucas, 29 December 2017 - 08:41 AM.