1940s Wood & Tin 10cm PERPLEX Harmonica Made in Germany U.S.Zone

1940s Wood & Tin 10cm PERPLEX Harmonica
Works well - aprox 8 reed notes...can get quite a decent tune out of it.
The metal piece on the front has the embossed words
PERPLEX
Made in Germany U.S.Zone
This dates it to between 1945 and 1949.
It measures 10 x 2.5cm 
The chrome surface is shiny and reflecting everything around it in the photos !