Hi guys I have an old single shot shotgun in my attic. The only description I can give you is it says Nitro on the left side. Doesn't say Nitro hunter, or leader...just nitro. No guage, no shell length. Nothing else. Serial number on the trigger guard, and a hammer to cock it. Something really interesting is that it has a 1955 nickel impaled in the right side of it. It is placed into some sort of indention manufactured in the gun. If I had to guess, it was made for Sears or the hardware stores. What do you think. Thanks.