My opinion on these is that they were tags wired to one of the company's products, say a roll of sheet brass or a spool of brass wire. The numbers punched on it had some meaning to the company, maybe the "catalog number" or weight/length/gauge of the item it was affixed to. I don't think the tool check, employee ID, or key tag ideas seem to fit since these are found all over the continent rather than localized to the company's location. Like the "Willow Calf" tags that were attached to shoes, the lamp tag pictured above (which probably was to indicate that "what you are buying is a No. whatever lamp), this tag was attached at the factory and detached by the end user. In some cases the factory probably hoped that the end user would keep the piece in his pocket as an advertisement, but few probably were. It reminds me of the aluminum tags wired to rose plants you get at the nursery today.
John in the 208