Box is marked Ignitor - Hamilton Part - No. 10-562 - McQuay-Norris - Pt No 543-1 Pkg
The only marking on the actual part is 8-56
I acquired this at an estate sale and the part was in the box, but I can't be sure that they belong together. The box has an additional paper insert which fits the part snugly, so I believe that they do go together. Please message me if you know.