The High Standard did not have a removable barrel.
"The new company initially had no production facilities. Production of the early guns was contracted out to the High Standard company. Eventually, Dan Wesson moved to it's own facilities located in a converted public school, located in Monson Massachusetts. This was a modern facility, for it's day, and was able to produce high quality firearms at a relatively low cost. The shop was also owned and run by gun enthusiasts, and was small enough that innovation, and variety were fairly easy to accomplish. High Standard continued to produce the design under it's own name for a time. The High Standard revolver had the styling, including the crane mounted cylinder latch, and the lockwork of the Dan Wessons, but without the interchangeable barrel feature."
Dave