Springfield does carry the same 4 ton clicker from weaver. If you look at the listing it shows their name on the clicker. I doubt they actually make the machine themselves,.
Whoever makes it most likely customizes it with the logo for the customer.
Springfield carries a Craftplus clicker that states up to 4 tons at 799.00. This is a new item they started to carry. They have a YT video where they are using it . If your not doing huge , huge business it would work for most of us on the forum. The video is DIY earrings with Liz. They demo it with veg tan stacked pretty thick, I cant remember the oz. they used but I think it was over 10 oz. I hope this helps.