Earlier this year I picked up a nice 4" model 10-8 heavy barrel from J&G sales that advertised these as police trade in's. There's nothing stamped on it that says "police" other than a C.A.I. importer stamp. I called S&W customer service & gave them the serial # and was told it was produced in 1985. Shoots great and has become my EDC in a OWB DeSantis thumb break speed scabbard.
A couple months ago I sent it back to S&W to get refurbished/reblued. I can't wait to get it back!