Nickel Silver
866 means silver plated sorry
It is nickel silver... no actual silver content.
From my current research into silver I would guess it's the purity. 999 is the purest silver you can find, Sterling is stamped 925, or 92.5% silver. I would guess 963 means 96.3% silver.
it is pure silver
Almost pure silver
When silver jewelry is stamped 80 SR it means that the jewelry is 80% silver.
if the number .925 is stamped on it also that means sterling silver if the number .999 is stamped on the ring that means it is pure silver if no numbers, i am not sure
yes
The I S stands for International Silver Company Meriden, Connecticut.
Solid silver
in a triangle "IRH"