Welcome, Dom91. Are these actually your grandfather's initials? Interesting that a piece of customized jewellery could be produced by a merchant...
If the perfume diffuses from the top, the perforations are not for that. Maybe to keep the lamp from becoming too hot?
[ATTACH] I think this is probably a 21K mark. This is a 12K mark; just reverse the characters for 21: [ATTACH]
The way 'Mrs. Thompson' is penciled on the frame makes me think the framing job was for her. Wonder if the painting is actually by someone else.
It looks like a lovely thing to have in your life.
Didn't know you had a Boston accent. :)
Separate names with a comma.