Any idea what these are for? They are about ten inches long. The jaw on what I'm calling the top side is a curved blade. It may have been sharp at one time, but it is not sharp now. The lower "jaw" is like a curved scoop, with a notch in the center so that the upper jaw can close into it.

It is marked 11m/m, which I take to mean metric and therefore the tool is European? (Or not. I bought it in Illinois.)

I've seen other sizes of these, mostly smaller, so apparently whatever it fits there are different sizes of them too. 

Could it be a tool to crimp some type of fitting on to tubing or conduit?

Resembles J  clip pliers used to crimp closures on cages.  The closures are J shaped.  When crimped they come out round.  Used to build cages, mend fence, etc.
https://www.ebay.com/itm/MILLER-PET-LODGE-ACP2-RABBIT-CAGE-J-CLIP-PLIERS-TOOL-WIRE-HUTCH-CLAMP-TRAP-CRIMP-/141351760523

Possibly Conduit cutters, the tool is rotated around the conduit while squeezing the handles and cuts the conduit. Cheers

The conduit ideas are intriguing. But the bottom jaw is dished AND curved (if that makes sense). You would not be able to clamp down on a piece of straight conduit without bending it?

Here is an end-on photo: 

How about for cutting a wheel weight?

Hmm. I'm surfing Ebay France right now, searching for "Ancien Pinces" (old pliers). I found one of these tools with replaceable jaws. The seller says it is marked RIGID. That strikes me as odd.


https://www.ebay.fr/itm/Ancien-outil-Pince-a-Cintrage-de-Marque-RIGID-8-forme-sabot/253061401756?hash=item3aeba28c9c:g:~N0AAOSwbApZdf-h


.

Well, turns out the guys who guessed "conduit" were on the right track. They have a set of these listed over on the MWTCA What's It pages, and the answer is that they are for putting a series of crimps in conduit in order to bend it around a corner. Makes perfect sense once you see the picture below.

Neat!!!!

A hickey eliminator?  Or pre-hickey squisher?


Chilly

That's the true beauty of all these mystery tools, our imaginations run amuck trying to put function to form. Is it used to crimp explosives? Is it a vets tool for clipping lion claws? Is it a Cold War instrument of KGB interrogation? Heh heh, nope, it's a conduit bend crimping tool (obviously). 

I bought some large stainless steel tongs at a yard sale, the seller said it was for moving hazardous material in a clean room. I had no reason to doubt him, made sense at the time. Brought it home to show the wife my new toy and she visibly shivered before starting to laugh. Turns out my new tool was indeed used to move hazardous things... it was used by doctors to pull out stuck babies!

Well, any parent can attest that babies can be hazardous to your mental health...

Quote from: moparthug on May 25, 2019, 10:00:12 PM
........ Turns out my new tool was indeed used to move hazardous things... it was used by doctors to pull out stuck babies!

Yow, a cranioclast. I have one also. A fearsome instrument indeed. Took me forever to find out what it actually was used for. Now that I know, I wish I didn't.