Takayuki YAGI

Model 36E (English, not Anglo), as suggested by the reed arrangement.

Off the topic but hidden bellows construction reminds me of this one: https://concertinamuseum.com/CM00405.htm

I enjoy observing anglos on the internet, I have seen a few in Lachenal (only 8 in nearly two decades). One was a C/G anglo with the Amboyna ends, which was listed in Barleycorn last year.

I also noticed this a while ago. The parts page remains, but the link from the top page is missing. https://www.concertinaconnection.com/spares.htm

Interesting to know that. Thank you. So how about Frank's "new model"??

A quote from Alex Holden's website: "One of the defining characteristics of traditional concertina reed shoes is that the underside of the vent is relieved (i.e. the bottom of the slot is slightly wider than the top). My current understanding is that this allows the reed to work properly even at very low bellows pressures, i.e. it enables you to play quietly if you want to. It also has an effect on the tone. " Please refer this page https://www.holdenconcertinas.com/reed-prototypes-part-1-frame-and-clamp/ .

In my view, it is the relieved vent slot that is important, whether screwed or riveted. I would like to know the cross-sectional shape of the slots in the DIX series. Do they slightly widen towards the bottom side?

Oh I didn't know that. Thank you for letting me know.

I own earlier Jones (#1312 26 button semi-miniature), however, it does not have the features mentioned above. So yours may be a prototype. The trap door arrangement reminds me of Henry Harley. So it might be a German origin...

Interesting. On page 33 of the book "The History of the Melodica" I found Gottlieb Kratzenstein's name and a reference to his free-reed "talking machine".

I suppose double (or sometimes triple) reeds tuned to octaves are not so uncommon in German concertinas. But curious instruments indeed.

If my memory serves, Fabbrica Concertine became Concertine Italia. Their catalogue page is here: https://www.concertineitalia.it/en/hayden-duet-46-concertina/hayden-duet-46-concertina-concertine-italia/

I misread, deleted.

A little bit different but similar. https://concertinamuseum.com/CM00385.htm

I believe Michael Tubridy also played in C with C/G concertina. In this clip (around 6:30) he didn't say directly though. Many concertina players were playing in C in the olden days.