you say golden necklace ?
Have you had it tested?
Can we see the whole necklace, both sides?
stamping looks new, I would think the stamping crevices would show some grime, deposits in the stamp
welcome to TN
Welcome to Treasurenet
On possibility is that this is: ASP 60 is a W-Mo-V-Co alloyed PM high speed steel
as described here: http://www.matweb.com/search/datasheettext.aspx?matguid=4cc861df3e5a42179849c94ec25d9eae
Don.......