Can someone plz help me identify this hallmark.

[Crystal75]

Can anyone tell me about this hallmark and or what it means.

 

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[JOHUNT]

I'm stumped. Looks to be a ring. Right? Is it sterling? Did and where did you find it?
I wish you luck in finding out. I'm sure someone here can help you!

 

[Mackaydon]

Johnson and Matthey mark the 'noble metal' platinum 'SC950' when it contains 5% palladium.
Don........
Source: https://docs.google.com/viewer?a=v&...T1OxeJ&sig=AHIEtbR5FdwuGgqMpE1x1rDXySy9eLVdSw