Clasps like that have had a long run & are still being made. I think you can use it if it closes securely enough to handle the weight.
Ah, they're now opera length. Or are is it matinee?
Peace on earth and Goodwill to Antiquers. :D
Fairly sure you do see it on silver from certain countries. Others who know will come along in time.
If they're a good size, that sounds lovely & dramatic.
I like the blue beads the way they are, except if I were restringing it, I would put small metal spacer beads between. The smallest that are...
My only comment on the Kramerness of the first necklace is that the 'tail' strikes me as peculiar. Creative, but peculiar. Can you find another...
Are you sure it starts with a W? Looks more like an M to me, or possibly an H.
It's really a puzzle. The fit with grandma's name when seen as SL is a confounding factor. Depending on orientation, the one part clearly looks...
Was grandma left handed?
According to the evidence of the orientation of the pin & which strokes of writing are on top of others, assuming it was written left to right,...
It looks like the initials S L to me, in cursive script. The flowers could be dogwood or forget-me-not.
Separate names with a comma.