Good observation, Charles.
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A closer view, one image colourised.
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Maybe a bit too balding to be Oswald?
Also, is he wearing a working man's Boiler Suit / Overalls, or is that a shadow on the Man's back and left Shoulder?
I don't think it's a Shadow as the Oswald Doppleganger appears to be in front of the tall guy with the Cap standing behind him.
Nothing appears that I can see in the Photograph that could cast such a small Shadow on the back of the Man's body.
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