14K gold Nugget pendant brought back to life

Hello,
I would like to share a piece I found and restored back to life. It is a 14K gold Nugget pendant metal detecting.
The loop apparently broke years ago due to the depth found.
I had to drill out the original loop.
I purchased a gold chain and bail spacer.the piece turned out pretty good for an amateur.
As you are viewing, does anyone recognize the assay mark on the Nugget?
Marked SW inside an oval or eye. Wishful thinking I thought Stephen Watson but I am not sure he made gold Nugget pendants.
I am relatively sure it is a vintage piece or at least 1980-1990.
Here is what it looks like.
Attachment 12805
Attachment 12806
Attachment 12807
Attachment 12808
Attachment 12809

It doesn’t look like a U.K. hallmark but it is a bit fuzzy. The makers mark isn’t in a shape I’ve ever been offered and I think the 14 k has been self identified by the maker and not stamped. Vintage at 30 years old makes me feel ancient!
The chain a little heavy for the size of the nugget perhaps but that’s a matter of taste

Well done for finding that.
By way of information a hallmark can only be added by an assay office in the UK, and is required by law if you are selling here.
In the absence of a hallmark, you can assume that the maker is/was based abroad. Dennis.

Correction. I should have said: A hallmark can only be added by an assay office in the UK, and is required by law if you are selling it here as gold. Dennis.

I have to agree 30 years old does not come under vintage