Interesting topic-so much so that I went out and bought a couple when i could
-even "brand named" ones have lots of manufacturing variance
my pattern 2, is make by Wilkinson Sword, yet we would call the craftsmanship awful.
you have this drawing?
In this photo
There are 3 types, from left to right Pattern 1, 2 and 3
I haven't yet been able to purchase a Pattern 1, but I have a Pattern 2, and a couple of Pattern 3's
Of those, I have a "beater" mk 3 that I had no reservations about taking apart; but not my mk2
the threaded tang is cut and peened over into the nut and I don't want to disturb the patina
Mk 2
The handle is blackened and made from solid brass-not cast, machined (roughly) with small filing flat spots all the way around at each end
It seems as if the knurling was done all over, then filed off at each end, but as bench work, not lathe work.
-the knurling is a very flat diamond with lots of overrun / runover spots (must have been hard to follow the changing diameter)
Mk 3
I have taken this one apart
-this handle is cast, you can see the mould form line
-material?, not brass, some sort of aluminum with a bronze coloured wash coating.
-the handle is pitted and constantly oxidizing with a white foamy oxide
although it is a white metal/ aluminum,it is fairly heavy
-the inside of the handle has been broached to a fairly decent rectangular hole on the guard end of the handle, while keeping the round countersunk hole at the tank end
that's something that the drawing doesn't show, the nut is a tapered nut that fits into s countersunk recess at the threaded tang end.
10-24 threaded tang
the tang differs from the drawing too, with about 5/16 width tang at the guard
If you want to be authentic, fits are sloppy !
I can answer specific questions.