My 28 button C/G anglo is a Lachenal, Serial number 166649. It is in modern, concert pitch (well, just a smidgin off) and not in Salvation Army pitch.
What is the place of these 28 button Anglos in the whole (historic) Anglo market? Why did Lachenal make them, rather than 30 button models?
By the way, the assignment of the top row is the same as a 30 button Lachenal, minus E/F on the left end, left hand and A/F on the right end, right hand.