You guys gave me so much info on my pre 24 that I would like for you to have a go at this one. I think it is probably a very nice restore. Bought on Gunbroker about 3 years ago. The left grip frame has a Z and the numeral 8 but can't see it in the pictures. The only numbers on the cylinder is the serial number. There in no N anywhere that I can find. The pearl grips have no markings.