The Conclusion
After 12 years of playing, building and modifying, the conclusion is clear - at least to me: this is a new instrument. It feels and behaves that way.

The secret lies in the combination of the following characteristics:

• Wider horizontal spacing between buttons: 15.5 mm
(“normal” Wheatstone h-spacing ≈ 12.4 mm)

• Wider
vertical spacing between buttons: 12.6 mm
(“normal” Wheatstone v-spacing ≈ 10.4 mm)

• Buttons that travel all the way down to the end plate

There are no thumb strap and pinkie rest, instead:

• An angled hand strap - not to be confused with English concertina wrist straps
It’s tempting to call them “angloed” hand straps - because that’s how they behave. There is full control of the pressure in the bellows, full control of dynamics.

• Corresponding (angle-wise) handrests or -rails.
These are a bit “undefinable” - they are there, but the don’t support very much and there is no lack of support (if
that makes any sense).

So - wider horizontal spacing - is that a new thing?
It’s not that the folks at Wheatstone wouldn’t listen:

Around 2009 I was in London and visited the Horniman Museum. In the little, poorly lit concertina display, one instrument caught my eye. See what I wrote in my little note book:


A 1914 Wheatstone baritone (small - 6 ¼”!). But it differed from the other instruments in the display: it had wider horizontal spacing.

I actually went through year 1914 pages in the Wheatstone ledgers, and even though there were a handful of (hex) baritones, none had any comments that could be interpreted as having something to do with button spacing. But trust me - I am over-sensitive to horizontal spacings!!

The (non-wobbling) WiMo in the North (The Irish Festival of Oulu 2017):

Photo: © Kari Arontie, - Kiitos, Kari!

- and the WiMo in the kitchen (without a camera man...):

Hit that Fullscreen icon (if your browser allows it - in which case you’ll have to find it on Youtube)