I have Nigel Brown's book and the serial number has a T in front of it and is in the 3200's and Nigel's book said at least the way I read it is the lower grade. But I see on for sale and it is a high grade from Westley with a T in front of the serial number's..The top leaver is not the crab leaver .

This gun is a plain Jane with no aditional engraving other than the name but a drop lock.
What it the T for ??? Grade?

monty