ok.. i have some information regarding the use of the concertina in the Salvation Army....
this is quoted from an email recieved from my uncle who is a salvation army officer and family history is in the salvation army.
"Concertinas, being compact and much lighter than accordians were in very wide us in the Army from very early years. Even in the missions with the Indians of Northern B.C., they were the instruments of choice. Grandpa Cruse (my great-grandfather) was a featured soloist on the instrument and Dad (my grandfather)was quite proficient as well. "(this is the instrument i now have).
"Colonel John Wells who was on missionary service in China was an noted composer of both music and song. He travelled around the rural areas of China on a bicycle with his concertina strapped on the back. Many of his published compositions he never heard performed, except on his concertina, until he returned to Canada after WWII. I'm sure he used it extensively while in a Japanise internment camp."
"The most well know maker was Wheatstone of England. There are others that I can't call to mind. By the way the instrument is still in fairly wide use in many Army locations around the world."
If I get some more information, i'll post it here as well....