FWIW, according this (astronomical) ebay auction for a matching set of matching NOS Topline cranks and BB: "The cranks come with 127mm Titanium spindled Topline Bottom bracket." Seems awfully wide, but what do I know? Maybe this is the BB length for a 3-ring setup?
Topline SLS Crankset w Titanium Bottom Bracket Tools etc in SEALED Package | eBay