brit sniper with REL canadian scope on gunbroker

wish it was in canada!

Enfield No. 4 MkI(T) w/original case, MKII scope : Curios and Relics at GunBroker.com

I smell a bit of fakery, in the attempt to make the scope and rifle match some doof done went and stamped the wrong number on the wrist. As far as I know all Mk.II's have O.S. 1650A on the tube. The scope s/n is actually 661-C. Several other things look fishy too. What does grey paint on the rifle and can indicate? I know what the yellow on the chest is supposed to mean.