Having analyzed many grainy, out of focus and otherwise hard to understand photos, I think I know what the image is showing.
The person in question is not a paid “extra”, but a casual passerby.
Having seen the camera, she doesn’t wish to be recognized.
The “phone” she’s holding is the collar of her coat.
Her hat is tilted toward the camera and the collar finished the job of concealing her face.
Nothing mysterious about the image, to my mind.
By the way, I AM a time traveler!
I came here from the starting point of 1933, pretty close to the TIME when the ‘mystery’ photo was taken.
It’s a hard road to travel and I find that I can’t get back, not that it was such a great place (time?) anyway.
After all, the Great Depression was in full swing then.
ddwwb
-- The best things in life aren't THINGS.