I have extended video of this somewhere in my video collection. Although I haven't watched it in quite a few years, If memory serves this video was taken arround the time of WWII, not sure about 1930. I'll get back when I have more info.
To help Bobby Jones swing in 1930? Don't think he needed much help . KOC do you have any further information?
I mean to teach the swing of Bobby Jones to other golfers!
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If you cannot take the shoulder down the clubshaft plane, you must take along some other path and add compensations - now, instead of one motion to remember, you wind up with at least two!