After all my research, I have come up with a few combinations, from Chris Algar (Barleycorn Concertinas) and Richard Evans (Australian maker/repairer).These combinations are: These combinations can be graphed against the dates predicted from the formula (using Excel spreadsheet) with the following results: A few observations are readily made: 1.
They're good instruments with "real" steel or brass concertina reeds and construction, but the action and sound won't be as nice or as consistent as some other makes mentioned below.
These instruments were all made in the UK, so "vintage English" usually refers to a Lachenal, Wheatstone, Jeffries or Crabb, and implies superior (compared to the Italian Stagis) quality of construction, sound, and playability (action).
In a competitive concertina-manufacturing and selling environment, the Lachenal company produced a range of very fine instruments, including many "student" models.
Anglo Lachenals are, as far as I know, all considered "student" grade.
Some people say the wooden-ended models have a mellower sound and so are better for accompaniment if you plan on singing at the same time, but I think this is a very general rule, and probably varies a lot from instrument to instrument.