Drive side's gotta be left-hand threaded unless someone tapped it out for Italian. OMAS made these BBs in English and Italian, and it ought to be marked on the cups. BSC 1.370" x 24 = English = left hand threads on right side. It's probably the venerable "Big Sliding" bb, a timeless choice. There was a Ti version, but even the CrMo axle one was quite lightweight because of the alloy cups.

Tapping out to Italian size was a way to save a frame if the BB threads were stripped and you didn't want to ruin the paint. Pretty rare repair, though. I have done 2 BB thread repairs and my go-to is to mig weld and retap as English, because the left hand threads are a Good Idea and if you're careful with heat it's possible to mig weld on the inside without ruining the paint on the outside.