Thanks for the answers to the questions about the grips and serial numbers. The agency that I retired from had a similar policy about replacement grips. In all probability, the rubber grips were installed by the officer, whom the gun was issued to, from a list of approved makers. The serial numbering seems like an interesting path for future research. It might be worth contacting the CHP to see if any records of acquisitions and disposals of the pistols could be obtained. If they are available, we might be able to get some idea of when a specific gun was acquired, issued, and released from inventory. I think that would be an interesting addition for those wanting to know a little bit of the history of the pistol they now own.