I lost my knob.

Bonzo said:

This is my (remaining) RH knob. Would it be original?

Click to expand...

My '71 has knurled knobs, well-aged and fixed with pins so I'd conclude that yes, your knurled knob is original.

LH-RH. the same Knob.
Keep tight .

There are AT LEAST 3 patterns out there, maybe 4.

I'd order a pair and keep the other as a spare.

Be sure to PROPERLY install the keeper pin, that's an age-old problem on pre-owned / older bikes.