The picture of the Butt Stock shows some markings:
M&D is "Militia and Defense" - showing Canadianmilitary ownership - I don't remember the period that M&D was used but I'm sure someone will chime in.
Below that is a roundel showing manufacture at the Enfield factory.
To the side, the two facing broad arrows are known aas the "sold out of service" marking showing the weapon was sold by the military to the civilian market.
Serial numbers are normally found on both the barrel and receiver ring on the right hand side. The rear facing side of the bolt handle is another place marked with the serial number. Finally, the rear sight leaf may also carry the serial number on the underside of the leaf.