Got this fork included with a soviet track frame and some other old parts i bought. Columbus fork ends, columbus tubing with helical ridges inside steerer. Has B engravings.

It's from a later 80's Bottecchia....

+1, it's a Bottecchia fork. The timeframe could extend into the early 1990s. During this era, MS, TSX, SLX, SL and even Cromor all used the the same gauge blades.