"I had to check a couple of old boxes, and Mike is right there would not have been paper on this if it is Sierra. Their later cardboard boxes that have paper labels have all the information on the paper label and none is printed directly on the box. My brain crossed the memory up. There is also printed branding on the tops of the old Sierra boxes I dug out, but if yours was early enough, it may have preceded that design. The thing in addition to the green metal corner that made me think of Sierra is the typeface used to write "Trophy." It may be another crossed-up memory, but I associate it with Sierra for some reason. Anyway, email them and see what they say. If it's not them, they may know who's it is. "
This is, I believe, the oldest form of Sierra bullet box, when they were still partially owned by Clint Harris and the Harris Machine Company in Whittier, California. It's a two piece box with an applied label that is printed with the product information.
I'm pretty sure that type of box was the standard right into the 1960s when the one-piece corner clamp box was introduced.
This picture shows the earlier corner clamp boxes with the printed wrap label and the later printed corner clamp box, which became standard in, IIRC, the early 1970s.
The later style printed corner clamp box remained the standard box until the introduction of plastic boxes sometime in the 1990s.
When I first saw it yesterday, the printing and fonts on Bama's box just screamed 1980s to me, and given the information he found on the lever guns forum I'm thinking that that is correct.