A picture would help. What sizes are they?
I have seen wrenches before marked "Champion", but only online.
I believe Champion Blower and Forge did ship wrenches with some of their items. I know I have seen one that goes with a post drill made by them in an eBay auction some time back. It was made to fit the square head set screws to tighten the "Never Slip" drill chuck, and the screws that secured the crank handles, flywheels and table adjustment clamp.
I'd be interested in trading for them if, after seeing them, they are for that purpose. I have two of there post drills, and a forge blower.