This tool is on http://67-72chevytrucks.com/vboard/showthread.php?t=620606 and they are looking for ID. I think it might be a saw wrest or sawset.

Are there markings on the jaws? It resembles a lead seal press, used with wire to seal carbs and fuel injection pumps from tampering. Seal presses are sometimes numbered or lettered to identify the shop or technician.

Good one Al!

also speedo cables on  some cars to prevent lease mileage fiddling

Also long ago meters for  gas, electric, water (any metered utility) for the same reason.   A fancier lead seal press was a "what's it?" topic in October (http://www.papawswrench.com/vboard/index.php?topic=9503. )