What I can tell from the photos is that that is is definitely a Model of 1899/1st Model .38 Military & Police (M&P). With a three digit serial number, it would be hard to imagine that it could be from anything other than the first year of production, and quite likely from within the first month's production.
A couple other things I notice are that the ejector rod knob is missing, and the strain screw (on the front strap of the grip frame) needs to be snugged up. That screw is to maintain tension on the mainspring that drives the hammer. If the screw is loose, the hammer may not have enough force to ignite the primer in the cartridge.
Mark