Double ended adjustable wrench

[superzstuff]

All these pictures of "S" shaped versions answered my original question. I remembered seeing a double ender in the 70's, but I thought the ends were turned in different directions. The standard styles, like the one I have, ends are turned in same direction.
Thanks for all the info. Happy to see all the interest.

[mvwcnews]

I ran across a CRESCENT "new product" ad for their double ender line in 1915 ( http://www.flickr.com/photos/mvwcnews/8411934259/ ).  The ad gives their rationale.   CRESCENT TOOL made them in the old heavy line & then in the lighter "CRESTOLOY" line as well.

Beside Crescent, Diamond Calk & Diamalloy, SCHOLLER, GEDORE, possibly hardware wholesaler brands like KEEN KUTTER, there were some odd German made imports in the 20s & early 30's that were just marked with the "maxim opening size" on each end.

[txtoolguy]

I'm late to this topic by years but I was looking for more information on Double Ended Adjustable Wrenches and landed here.   I see all the comments and brands which is very interesting but to add a few cents to the conversation,  I believe Lakeside and Merit were actually made by Diamond. 

thx

-tx-

[d42jeep]

I noticed this 12” x 10” Diamond Calk double ender on eBay this morning. I’ve found a couple at sales over the years in Diamond and Crescent.
https://www.ebay.com/itm/156966598689
-Don

[Bill Houghton]

One end's for square nuts/bolts, and the other for hex.

[geneg]

Mine has one end for standard & one end for metric

[Yadda]

I'm still looking for the rare double Torx. 

[Bill Houghton]

Mine has one end for standard & one end for metric

Best not buy an early 50s or earlier British car/motorcycle, then, or you'll need to find a triple adjustable, to cover the Whitworth nuts.