Believe it or not, it is in excellent condition for a RHA Co. headstamp. Here is the best quality Clipper that I have in my collection.
http://headstamps.x10.mx/rhaclp12_001.html
You asked if it is worth anything. Unfortunately, no. There is a very, very small amount of headstamps that will be worth anything. All brass shells, some bullet casings and complete shotshells is a different story though (especially boxes).
The true value is shotshell heads is what they can tell you about the area you are detecting, the person that lost or discarded the shotshell, general information about the community you are hunting in or near, and to an extent national "thoughts" during that time period.
There is a small group of people who are avid collectors of shotshell heads though, me included. Many people collect them for many reasons. For me, it is an obsession. I want to see just how many different lines and varieties within the lines I can identify. I want to learn what I can about these lines of shells, how they were marketed, who they were marketed to, why the companies chose the names, what the names meant during the time they were sold and so much more.
My personal collection consists of over 5,000 shotshell heads from all over the world. My shotshell heads include pinfire heads found in Civil War battlefields, shotshell heads found on the Jersey shore, from early New England home sites, silver mine and gold mine areas, city parks and so much more. I have a dozen different gauges so far.
You truly have a great find!
Doug
