Does it look like this one?
I put this one up for sale and I asked this same question a few months ago. Here's what another forum member told me:
"Made by Herbert Schmidt, Osthelm , West Germany ( now ,just Germany}. During the 1950's and 60's the Model 21/Bison/Buffalo Scout was imported by over 30 different importers and under just as many names. Imported as a cheaper alternative to the Ruger Single Six or the Colt Frontier. A decent little gun for the price; but not built to the standards of the Ruger. Value if in excellent condition 125 to 135. Hope that helps. BTW, this gun has not been produce for over 40 years and Schmidt no longer makes Handguns ( to my knowledge ), parts are getting scarce to non existing."
Hope this helps,
Rob