[lugerholsterrepair]

I collect tools and I think this one is a fake. Fakes are made with a softer material than the Germans used and that's why you see the deep set stamping. Also they do not hold up well as screwdrivers.
You will notice there is little in the way of an edge in the bottom of the hole. This enables the tool to grip the magazine follower button. Without the edge it will slip off.
I would take a caliper and get an accurate measurement. If it's over 10 thousands I would be very suspicious. I am already.
The stamping is so smashed in it's hard to say what it is.
Jerry Burney