"T" things that shouldn't exist

[Roger Payne]

Yep. Zinc alloy. I think known as zamak in North America.

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[CINDERS]

This had me looking at the one on my BSA '44 T and it too bears a solid block which is an out of spec reject Page 56 An Armourers Perspective.
But the sight block itself has an S-23 stamp on the rear ramp section of it also the front blade is a MK-1 type it bears no cross hatching this again is unacceptable or out of spec as per reference on Page - 56.
So I do realise in the scheme of things during war peculiar things happen were the T's required to come back to base workshops for repairs or could they be done in the field by the armourers.
I am not that much of a purist that I am going to swap it out I have the parts but like the earlier forum members observation with his '45 BSA T it appears to be part of the original make up.

If any thing was changed on the weapon Peter do they mark the rifle I realise the FTR stamping for major repairs but what if they only changed the front sight block for some reason would you be able to explain this.
Mine also has the Ali looking butt plate.
Thanks in advance.