I have a .50cal Plainsman black powder rifle and had the same question. I found the 2 links below that show a gun that looks almost identical to mine and they each list CVA as the manufacture: http://www.gunsandammomag.com/cs/Satellite/IMO_GA/Gun_C/CVA+Plainsman http://www.auctionarms.com/search/printitem.cfm?ItemNum=8317215 I hope that helps.
In excellent condition (Like Brand New) it's worth $65 in poor condition it's worth $20. You did not state the condition of the rifle so I can not give you a closer estimate. It was made by Healthways Inc.
Want ad, gun shop, gun show, pawn shop
The duration of The Plainsman is 1.88 hours.
The Auburn Plainsman was created in 1893.
The Plainsman was created on 1936-11-16.
I have a copy. It is a very small manual 13 pages of 5x4 inches. The rifle was marketed in the US by COMB Inc. Just a guest answering here, but will watch and if you want to post an email address, I could send a copy. Will watch for future postings/questions.
The duration of Law of the Plainsman is 1800.0 seconds.
Riverwind the Plainsman has 313 pages.
Law of the Plainsman was created on 1959-10-01.
Law of the Plainsman ended on 1960-05-05.
Riverwind the Plainsman was created on 1990-03-31.
Plainsman - South Dakota - was created in 1886.