A far more sensible arrangement for double reeds than the Lachenals I've seen, and much more tuner friendly I would imagine.
Mike, is this a standard size body, 6 1/4" across the flats? Also wondering how yours is tuned; dry or tremolo?
When I first got the concertina I think it was 'mussette' tuned and sounded too much like a melodeon, it has been re-tuned to a much dryer sound.
It has eight fold bellows and is 7" across the flats No. 32389.