These two unusual items date from the 1950’s-70’s and contain several clear Perspex channelled pieces.
I would imagine these are not complete, however as I have no idea how they worked it is difficult to be sure.
The items are generally in good condition, the cases have scrapes, and there is surface corrosion to the clasps.
The two cases are made from mahogany plywood and measure 19.75” long, 5.75” wide and 3” deep.
To the front are sticky lapels stating Cochlea model No. C5/A, and C8/A.