Track hubs are 120, not 125. Some were, and in Japan, still are 110. My hub was also a 110 until I put in a longer axle ($3) and put on two nuts as extra spacers (50c).

It should have the standard 42mm chainline with a normal cog, though. Anyway, if you have chainline trobles, you can play with the spacers easily, as you need them in any case. (unless it's a flipflop and you'll use both sides)