So I don't think they are worth much so I don't really care about that part, more curious of history and age. I know NOTHING about ornaments I have 4 kids so I use plastic!
No marks, I have two boxes and they all have that same caps.
One side indent, small neck no mark
Marked "West Germany", small neck
Double indent marked "Made in U S of A"
"Poland" single side
All marked "Shiny Bright"
Another Shiny Bright but larger shown here for size
Mark "Made in U S of A"
And just to show off my fav attic find, Lighted Ice GE bulbs