While it may not be a lot of help and I know of no other images available I can tell you that image is from the book "Peacemakers: Arms and Adventure in the American West" by R. L. Wilson. My copy of the book is on loaner or I'd check it for you - I do know there was a good caption with some info (IIRC it weighs 2.5 lbs?). There should also be a picture credit in the back of the book which may give you the name of the collector/museum and so you may be able to contact them directly then. Hope that helps and the book is a real gen for the cheap price.