This is really interesting, Hansel - not sure I've ever seen such an application on a glass marble - a low temperature fire for decoration?
My guess is rolling.
Sorry, I couldn't stop myself. 🙂
The first three marbles are modern ones, probably from China. The next is a nice German handmade marble cut from a cane. The last one does appear to be a Marble King cross-through Cat's Eye.
Vacors are not the only marbles that show an orange peel texture on their surface but many of them, especially larger ones, do show the trait. This marble is not American and may be Vacor but it's pretty hard to tell from a single view.
I think most or all of these are not American made. Some appear to be Vacor marbles from Mexico. Others may be European or Asian.
Also, "same cane" is a term used for handmade marbles that are cut from a cane of glass. They will show pontil marks from the process.
This is the only pic of it I have handy at the moment but I can take more tomorrow if it will help. It is an odd one sort of a brushed patch with yellow stripes.
I'm a little confused now Art. So Master Made didn't put their marbles in Master Made boxes but Master Glass did?
And I assure you, there are no Imperial Marbles in that group.
Of course, it's always tough to tell "original" with a box but I don't see anything that looks too out of place.
I'll be interested to hear what @akroorka says, though.