SequoiaBET

Also a possibility with the crease pontil. I have so few MFC's for comparison.

Got it Chad. Thanks for the info! I'll have to look at my solid cores to see if I might have any jelly cores. That is a new distinction for me. Nice marbles by the way...

I thought this might be an Akro, but it is more complicated than that. To start, the frosted finish is unlike any Akros I have. Then when I looked at it closely, I think there are 2 separate corkscrews, each starting at an opposite pole and spiraling in opposite directions. The last picture shows where the top cork trails into the lower one. It also shows where the lower cork tail ends as a thin line barely separated from the main mass of the lower cork (at about 4pm in the pic). This makes me think it's hand made. There is a possible pinched or crease pontil at one pole as seen in pic 5. So I'm thinking it may be a Yasuda?

What makes a "Jelly Core"? I've never heard that term used.

Thanks folks! I had it with my Ravenswood, but I didn't want to wager that as a guess in my post. I always seem to think that only to find out they are Alley. Glad I had this one correct!

Thanks for clarifying. So do folks think these 4 are from MFC?

I don't think CAC made Ox Bricks- but I'm not expert and am still learning myself. If anyone can clarify that amongst vintage machine mades only Akro and MFC made bricks, that would be helpful. (JABO has made some bricks too, but they are VVHTF.)

They are very similar, but not identical. The larger one is 2/3 (.66) inch and the smaller one is %/8 (.62) inch.

Any ideas on this one? It's 39/64 (.61) inches.

I don't know about the presence of white glass question. I'd be interested to learn more too. I just posted the other 4 bricks I have for comparison. I think at least 3 of those are MFC. Thanks to all for your help and comments!

Here are 4 more Ox Bricks. I can clearly see what I think are 9 and tails in the first 3, but I'm not as sure about the 4th one (in the lower right corner). The top 2 are 3/4", then 41/64", and the last one is 5/8". I'm wondering if the last one is Akro. The ox looks to be a slightly different shade than the other 3 and I don't see a 9 and tail. Any thoughts are welcome- Thanks!

Thanks for your help too, VA! I always appreciate all who spend the time to help out with ID. You have some stunning furnace marbles!

Yes, those look just like mine. Thanks Nantucket! (You have a nice sampling there!)

Just for clarification- St. Mary's or Sistersville?

Good advice Fire. Getting to see more examples definitely helps to train the eye. You'll love THE BOOK- I splurged and got it. Lots of super high quality swirls. Much better looking than most of my examples!