No.3 MK 1, need a little id help *photo heavy*

[Parashooter]

Not a "No.3 MK 1" but rather an SMLE MK III* (No.1 MK III*), made at Australia's Lithgow factory. See https://www.milsurps.com/content.php...Infantry-Rifle for details including an explanation of the aftermarket "JJCO" marking.