I don’t know what Harry is actually pretending to do in this shot. Is he squeezing  a very small cantaloupe, or is he just bragging to his assistant, ‘Look, Melvin, I can palm a grapefruit.”
I do know he’s behind the wheel of his own delivery truck, and what a great truck it is. Check out where they put the rearview mirror in those days.
The photo, as always, is clickable.

I think the mirror is missing a support strut, and has fallen down. Where it is now, it can’t see around the box of the truck, and the angle between Harry and the mirror means that he only sees the asphalt right beside the door.
–Bob.
Harry Dubin is my grandfather! I am staring at his 5-year-old namesake now. There’s a wonderful story behind all these photos I’m sure my father–and Harry’s son–Ronald Dubin is happy to explain. Thanks for sharing what we already know: Harry Dubin is one-of-a-kind and based on these shots, one of every kind
He and all his lives were a special part of my life. Still are, as you can see.