So far as I can tell, the back is the right one for this Model 2, so maybe it was dropped at some point.
I've just come home with another 47A. Interestingly, this one has a leather case which is a lot taller than usual, with some felt covered rectangles inside the case to hold the sides of the Avo.
Been an interesting week so far with Avos. Yesterday I went to collect another 9 Mk2 and came home with two 9 Mk2s.
I need help.