huh, that does look exactly like the fist I have. The injection ports are not visible on the one at tfu, I don't know if that's significant. The weird thing is that I got this fist from a woman who was giving me her son's old collection. And as far as I know, he wasn't importing stuff in the 80's.
Sorry havent been here for a while, to busy with a lot of stuff.
There are several versions of the browning mold. Microchange gun robo for example (M1910), but there are also 1980's Knock offs of the microchange version. There's also the joustra version (blue inner legs), but that one was sold mostly in europe (france, belgium, holland).
A few friends of mine have the microchange version, all bought in the US through E-B***. Also the KO (red inner legs) is bought on the same auction site.. So that one could also been sold in the US in the past.
There are more browning fists/guns/bullets arround then there are browning for sale, so it's possible the KO's were available in the US in the 80's.