It was made for High Standard by Dan Wesson in the mid 1970s and will take the same speedloaders as a "K" frame Smith & Wesson.
I don't know what you want for a holster, but I bet a Hume JIT would do.
http://www.donhume.com/Products/Prod...m?ProductID=53
You have to read the fine print, they DO make them for revolvers.