The "M's" look good to me ... first thing I look for on a Navy... (The late Tom Armstrong taught me that!) The magazine bottom finish and numbering are a little too nice for my taste... They don't look as old as the pistol.
The grips are DWM, but look like they have refreshed checkering to me. The "50" stamps in them look pretty crisp as well.
I agree with Ed, that this gun was probably refurbished a long time ago. A nice job. I have no idea about the market price on Navies... I stopped tracking them since I can't afford one!
