www.925-1000.com

Hi ashclam
the outline of the number 925 corresponds to that required by Italian law (red arrow).
https://i.postimg.cc/mtZ7Ptcf/punzo.jpg
There should also be an elongated hexagon that contains a star followed by a number and two letters ( green arrow). The latter identifies the manufacturer ...

I purchased this sterling silver chain from an auction a while back.
I have been trying to track down the owner/maker.

Specs:
15mm thick
22 inches long
128 grams

Any help would be greatly appreciated. Images are below.

Thank you in advance.

https://i.postimg.cc/kBZVRJvJ/0-CB92-E20-E9-D7-4-A4 ...

I purchased this sterling silver chain from an auction a while back.
I have been trying to track down the owner/maker.

Specs:
15mm thick
22 inches long
128 grams

Any help would be greatly appreciated. Image is below, I do have one more image which has a different stamp so can share.

Thank you ...