Patrick,
I think the most obvious thing is that the rifle is a Mk2 of post-War manufacture. The wartime contracts did run over a little, into 1946, & the Indians did re-work & redate some No4T's in the early 1960's but with those minor exceptions no No4 T's were produced post WW2. The rifle has a six digit serial number; so far as we know no Faz rifles were converted to T's; the pad screws are bright steel; some tyro has engraved a 'T' on the bracket for good measure.......etc.....etc.
But the scope & bracket are real! The scope is eminently restorable; strip & either reblue or blast/phos/suncorite - then reassemble. I don't generally like refinishing but sometimes a piece of kit looks such a mess that I feel a sympathetic refinish can only improve it.....!