This 6 1/2" Braunsdorf-Mueller (BMC) Holtyte adjustable, developed in the 1900-1910 period, was intended to compete with the Crescent adjustable wrenches just then coming into the market. Found at a local flea market. 

It must have made your eyes pop to see that sitting on the counter.

Nice little item!

Very cool; I've never seen one before...

And what did that set you back at the flea?

I don't remember. Not much. I am chintzy.

That is a great one to have! I bet there weren't many of them.

Don't get me wrong - it's a nice piece! - but I can see why the Crescent design stayed and this one disappeared. The "knurl in the middle" style is easier to adjust one-handed, and you don't have a thumbwheel sticking out the side.
Again, it is a beauty.

 Very nice wrench. I would surely have wanted it.