1950s Wood & Tin 8cm FRIENDS Harmonica Made in Japan

I found a box of these in an old toy warehouse I cleared years and years ago.
And they still work - aprox 3 reed notes...more for making a noise than playing a symphony !
Each metal piece has the words Friends and Japan embossed into it and is
attached to both sides of the red dyed wood
They measure 8 x 2cm 
The harmonica has some wear to the chrome finish (it has some oxidation or patina but no rust)