I picked up a non-factory electroless nickle Model 28-3 at the Tulsa Gun Show today. It is not pinned but is recessed. The Serial Number is N2272XX which seems to be way out of sequence. There is obviously little wear on the breach face and it does not seem to have been repolished so it seems it was refinished when it was near new, There is also little evidence of peening in the cylinder stops. I will try to get a camera that will take a close up of the SN and Model number in the yoke recess. Any idea why the SN would be that out of sequence?