Yes, another what tool is it

[gol4]

I went to pawnshop today looking in tool boxes and bins and found this. There is not one identifying mark on it to even give me a clue.
As you can see from the pics. The handle is knurled and the jaws seem to have light machine marks. As I twist the handle counter clockwise the jaws spread apart.
My guess, it is some kind of clamp or a badly worn measuring device as there is a lot of play in the jaws. The handle end is slightly mushroomed like it had been hammered on. The last 2 pics are it disassembled. The last one is to show machining on the jaws.

 

[BarnFab]

It is an old school shifting spanner

 

[gol4]

Thanks Barnfab,
Seems you are correct. Wikipedia shows it as a french key under adjustable wrenches. I have seen many adjustable wrenches in my day but none like this.
This forum is great where else can you get such varied great information.

 

[Cheeky81]

Yep... It's older adjustable wrench.
I remember my dad has one in his toolbox and he simply calls it a frenchman.

 

[gol4]

Look, I found its big brother, This one appears to be the same thing, only twice the size.

http://www.ebay.com/itm/370641219023?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_500wt_1415

Will be curious to see what it actually goes for. It is already at more than I gave.