I''m thinking Vacor. Modern.
But which style?
How close to orange is that red? Could they be Seahorses?
https://www.billes-en-tete.com/detail.php?id=246
The first one looks like it could be Peltier. It has lots of moons ... maybe it was from kids playing in the area.
The 2nd one looks like a Rainbo.
I know Pelt did make peewees. Don't know about 5/16".
Supposedly these are for real marble marbles:
The ones with the red vanes are called "blood allies". Back in the 1800's those were prized. I don't think a company can be pinned down for actual marble marbles. Other stones have been used for playing marbles. The California Agate Company made marbles from Mexican onyx in the 1920's and 1930's.
Short answer: yes
If they were made for playing -- and many were -- then they're marbles.
The farther we get away from them being used as toys, the closer we get to calling them "mineral spheres".
I can't remember if Pelt did clearies for play. I need to figure out where I put my copy of American Machine-Made Marbles. It could tell us.
If they didn't do clearies for play, maybe they did them as decorative gems like you sometimes find at craft stores.
Yep, folks, he has the bug. And when you start feeling frustrated about something not clicking with marbles, think how many hours you put into studying meteorites before you were able to know them like the back of your hand. But you'll get there.
West Virginia swirl ... .
Looks like cold rolls. Maybe the marble got hung up in the machinery somewhere between the furnace and the end of the rollers.
Check out this thread .... you might get a "Confederate" ID for some of your marbles.
http://marbleconnection.com/topic/23646-peltier-confederates-vs-gray-goats/
The lime green is pretty. I don't know that I would call it a different type. I"m more of a "lumper" these days than I used to be. (Lumping marbles together.)