Here she is! It's a LMMH accordion.
Something really cool is that there are 4 options you can choose from with the bass machine from the two switches - I originally thought there was only two settings. You can lock all the reeds out except for the highest tuned ones, which turns the bass into what sounds like the piccolo setting for the treble side.
Here's the order (from left to right) of the treble register switches. Clarinet, Bassoon, Piccolo, Bandoneon, Master, Accordion, Organ, Harmonium, Violin.
Here are some pictures while I had the accordion apart to inspect everything. Looks like the reeds are handmade reeds, judging from the domed rivets on each reed.
Very versatile!