Welch Regimet Anodised

[41st]

I'm looking for some opinions from those members who specialise in Anodised badges on these three to the Welch Regiment.
1 & 2 are of what I believe to be a well worn but genuine Gaunt marked example with full silver back.
3 & 4 are of a Smith & Wright example but this time with a full gold back. Is this right?
5 & 6 are of what I regard to be a modern copy with an impressed back.
Can anyone please confirm my opinions or advise otherwise.
Diolch yn fawr,
Kevin