I got two of these old Olt calls, they are both F-6 models. They are about 1"x1"x3.5" long, small hard rubberboxes with a thin wood plate screwed to the top. One box is rectangular and looks newer than the other which has rounded ends like the one below.

How do they work? I tried a plastic striker on the wood lid but nothing. I got this photo off the web but it doesn't say what the striker is made of.

HJ?



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