I've got that accordion's 72-bass sibling and absolutely love it! The Monte line is inspired by a very distinctive type of accordion called a Steirische Harmonika
. That's why it has that woodgrain look and those little silver horn thingies. And that's why most Montes have what's called a "Helikon" bass, which is designed to have a powerful tuba-like tone. Helikon bass accordions typically don't have LH register switches. (At least I've never seen one that I can recall...)
All that said, as much as I enjoy my Monte, the Helikon bass does make it most suitable to alpine folk music and that sort of thing. It doesn't really work well for other styles, so I can see how having it as your one-and-only accordion might be problematic. Be tough to send that one back though... I'd be looking around the house for things I could sell in order to just buy a second accordion to go with it.
BTW, I think the latest incarnation of Weltmeister has switched to faux woodgrain celluloid for the Monte, rather than a real wood finish. So you've got a bit of a collector's item on your hands too!