| A friend of mine has a Wheatstone English concertina circa 1912 which is
| tuned flat. Anyone out there familiar with a resource to retune it to
| standard pitch? I should also say that he is somewhat concerned about
| doing this in case he destroys the character of the instrument, either
| musically or historically!
You didn't say where in the world you or your friend might
be, but ... A quick check with AltaVista turned up these
URLs that may be of some interest:
There are a bunch of others, too.