There was no requirement to number the bracket to the rifle by anyone initially. It came about much later. Even up to the 70's and into the L42 era it was quite common to see No4T's without a numbered bracket. Cl;early there is some misinformation surrounding this that needs correcting before a mixture of this pure ......., er........... misinformation becomes gospel. Maybe someone can resurrect it. Or do I have to repeat it.
Regarding DRP's thread 8. Bros, please understand that was how to 'correct' things and not how they were set up originally