Purchased a Pietta 1858 NMA, NIB, from an individual. Revolver functioned fine. Disassembled for a thorough cleaning and upon reassembly discovered the cylinder would not turn. Inspection revealed that Hand spring no long contacts Hand Slot in frame. Hand has no spring tension. Below is a picture of the Hand and Hammer sans hand screw in “installed position” but out of the frame. Does anything look askew? Suggestions from the more experienced and wise would be appreciated.