I have a .44 H.E. that is nickle plated with brown S&W grips. All the numbers are 7 with the Roman numeral VII scratched inside the right hand grip. On the receiver is a Z with a star above it and the number 23 just below that. The same Z and star is marked on the barrel and the front of the cyclinder. Also on the front of the cyclinder is the letters ELG in an oval. The barrel markings are one line that reads Smith & Wesson Springfield Mass. Patents Ap 5,55 Jul 6 .59 Nov 24 .63. It has a 7 stamped on the bottom of the barrel, a 7 on the barrel latch and a 7 inside the receiver flat as well as an N. It has a lanyard ring on the bottom of the butt. Can anyone help identify this pistol? Also the extractor cam appears to be worn out and does anyone know where I can get a good one? Would a cam from a .38 H.E. work?