Of course, a Bell47 was flown from the left.
Now I have checkout the Flight Manual again. All I have found is this:
FLIGHT MANUAL
Helicopter Agusta-Bell AB47G-3B-1
Issue dated 8.1.1964 on Page 1-8
„Basis configuration of the helicopter permits his use as a three place aircraft limited to VFR day and night operating conditions“
Nothing about right or left. „three place“ thats all .........
Remember, this manual was printet 1964.
Maybe, it was a other time.