I'm a new member - looking for additional information about the subject handgun. Not much on the web to fill in the blanks as there are almost no markings on the gun itself to refer to - only the Serial # 1957 under the grip and the stamped "The American Double Action" on the top of the frame. I've attached pictures - but am most interested in the approx. year made, value, and whether its worth keeping or sending down the road to a collector. Thanks in advance.