Takayuki YAGI

How about the Button Box? https://www.buttonbox.com/concertinas-in-stock.html

Another one with levers (damaged but with Campbells label) is on ebay now. https://www.ebay.com/itm/324729750601

Similar one is on ebay now. https://www.ebay.com/itm/334089437419

Barleycorn now lists one for sale. https://concertina.co.uk/stock-selection/anglo-concertinas/kensington-30-key-anglo-in-c-g/

I Just noticed that Concertina Museum Ref:C-270 (Nickolds) has similar ends.

I think it was Tidder, not Tedder.

There was a former thread about Thomas concertina (of Wales) here.

I think it is Norman "model H" specially made for Homewood Music in early 2000s. Here is the link (archive.org).

I recently noticed that my early Bastari which is exactly the same model as Ken's Bastari (numbered 13X instead of 52X) has different air button lever and pad layout from Wizard anglo. Is it possible that these Bastaris and Wizard anglos were manufactured at different periods ?

Just for your reference, there is 1950's brochure of May Fair including finger chart.

I do not have inside photo currently. But I believe it has 22 button originally (not modified from 20 button) and have English type construction not German one.

It might be a 42-key chromatic anglo described in Jones' 1884 patent. http://www.concertina.com/jones/index.htm

The fretwork reminds me of Jones too. But 7 buttons in a row looks unusual to me. In the photo above the 6th button has riveted action but 7th one (and air button) have hooked action. So this might be a result of a modification.

The article is here but in the archive.org. I too think the Lachenal formula is outdated. I recommend to post an inquiry to the "Dating A Lachenal From The Serial Number" thread for more precise information. Taka

I now own the one described above. Celestial means double reed tremolo tuning according to the Dan Warroll's article here.

I don't know if I should upload it but I archived a photo from ebay 2016 and it shows separate reed chamber and enlarged(doubled) pads.

I think the first one was filmed in Japan, at Birdland Cafe in Kanagawa, not in Okinawa.

That one in the photo has similar bellows papers to my old Bastari.

According to thesession.org (please see the last comment from Jason himself), the composer of this tune is Fabio Colussi. http://fabiocolussi.altervista.org/index.html

Update: They say overseas shipping is now available, with newly designed items. https://jabaraparty.official.ec/categories/1213877

A similar one was discussed before: https://www.concertina.net/forums/index.php?/topic/17785-german-20-key-with-switchable-second-voice/

Packie Russell recording

Or you can use this contact form to John Dipper. As mathhag said, with the serial number I think they can provide details. http://www.johndipper.co.uk/concertinas/contact.htm ?

Does it have "Louis Lachenal" label or "Lachenal & Co" label ? If the latter, it might be 114949 (leading 1 missing) or 14949X. I once saw the photo of 15130 (slightly later than yours) which had "Louis Lachenal" label and numbered keys. That was with 20 buttons though. ?