Hot Rods Anyone ever seen these?

Came off my grandpa's 36 Chevy. Some kind of aftermarket thumb assist for turning I'm guessing. Was wondering if anyone else had some.

 

Never seen them, I don't know about sticking my thumb in one of em.

 

I never saw those before, either. If they're some kind of factory accessory item or an aftermarket thing made specifically to fit those early Chevy's, they'd be worth a fortune to the lowrider bomb crowd.

 

@Moriarity

Can you enlarge this

 

Even enlarged I have no clue what they are.
Side views would be helpful.

 

Do they come apart? Did they come from the steering wheel? Some sort of bolt on knurl to make for a better grip? They are shiny and should not be discounted.

 

All of you behind the PC and imagine your thumb in the big hole and index finger and middle finger in the two indents . Now imagine it,s late night 1936 and your out in the boonies on a long straight road and you fall asleep behind the wheel . At least your still going in a straight line.

 

Looks like a good way to end up with broken thumbs.

 

as the section line road makes a 90.