Unidentified hallmarks

[kgray8791]

Hi i was wondering if anyone could help me identify the hallmarks on these rings! I would appreciate it very much because im extremely curious but i dont even know how to describe them in a search and searching by photo didnt work either! The one that ssays sj inside a shield with 10 on one side and k on the other is from a 1963 class ring if that helps (that one is a little fuzzy)!

 

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[coinman123]

Maybe Jostens for the class ring.