Huse & Carleton Advertising Tag

I found this while looking through an old family button box and have enjoyed piecing together as much info as I can, but would certainly welcome any additional thoughts from CCF.

Huse & Carelton, out of Boston Massachusetts, seems to have been a depression-era manufacturer of kitchen stove and residential heater parts and repair tools. As my great-grandfather was a plumber, I think that this advertising tag was likely brazed onto one of his tools. The radius of curvature of the remnant braze suggests that this tool was 8-10 mm in diameter; however, the specific tool is still unknown to me. It doesn't look to me like this tag was attached to a flat surface.

Also interesting is that this tag was made by The Green Duck Company. According to the Antique Advertising Expert's website:




https://www.antiqueadvertisingexper...uck-company/

I haven't been able to find any other examples of this metal tag posted on the interwebs, either affixed to their original tool or broken off like mine.