Sometimes you find things while searching for other things that make you wonder just what the @#% it is that you found, and how the @#% it relates to what you were searching for… this is one of those things!
http://www.amwa-water.org/hohner_concertina.html
What was it you were searching for and then we can all be #$@%#@!%$#@ upset with you! 
How strange.
It is the same Chinese made box I seen at our local music mega chain store, but that one is 150 bucks, the inside row is nutty. Outside is Diatonic C.
Good luck.
This looks like someone practicing search engine optimization.
Wonderful reading 
HOHNER CONCERTINA: motionless air. When at rare intervals a slight breeze did arise, it brought but a whiff of hot air filled with dust and smelling of oil paint. There were few people in the streets, and those who were out tried to keep on the shady side. Only the sunburnt peasants, with their bronzed faces and bark shoes on their feet, who were mending the road, sat hammering the stones into the burning sand in the sun; while the policemen, in their holland blouses, with revolvers fastened with orange cords, stood melancholy and depressed in the middle of the road, changing