eBay item number:302169433891

1893 Chicago World's Fair ~ SOUVENIR ~ H. BORNSTEIN WRENCH

They are nice little wrenches, he would have a better chance of selling it if it was listed differently. The knurled ring can be twisted to lock the wrench opening setting. This one is nicer then the one I have.

I have one of the larger ones which comes with a wooden handle. I don't think either one is real common.

Mike