Ric

That yellow spiral on red/orange is very nice, Joep!

That's a beautiful Carnelian!

Yes, although it may or may not have been intentional, and while there are probably more "V"s on Vitros than other makers, the trait is not exclusive to Vitro. It usually happens when the seams are "pinched together" (both are found on the same half of the marble) and a "fold" results.

I've not seen a Japanese transitional that's 15/16" - do they get that big?

37 F would be downright balmy around here lately.

Just go ahead and tell them now . . . "I plan to be violently ill March 20-23".

An easy way to remember the sizing scale is: 5/8" = 10/16" = No. 0 (in reality, anything from a hair over 9/16" up to 5/8" is a No. 0) 11/16" = No. 1 3/4" = 12/16 = No. 2 etc. Just add zeroes for 1/16" increments less than 5/8" (No. 0) player size. Peewees = not a hair bigger than 1/2" = No. 000 9/16" = No. 00

It should be noted that the size of marbles within any "size number" group can vary considerably. For instance, a No. 0 can be anywhere from a hair over 9/16" up to 5/8", a No 2 could be anywhere from a hair over 11/16" to 3/4", etc.

Some good shots of any ribbon ends usually helps a lot with ID. But it looks like it could be an Alley Ghost or variant here.

It's hard to tell from these pics. It might be Master but it's damaged to the point where it has no significant monetary value.

I agree with JABO on the left and right. The middle is a little odd. It might be Vitro but it looks like it could be an odd MK too.

They all look Vitro to me, maybe an outside chance of JABO for the last one. I like the script "V".

Here's a good place to start . . . https://marbleconnection.com/search/?&q=guinea&page=1&quick=1&nodes=20&search_and_or=or&search_in=titles&sortby=relevancy

For starters, Guineas have at least one seam.

I agree with Melissa on the first one, the second is an Alley, not sure about the third one though.

I have not seen any such list compiled. I have seen sales brochures and paperwork that lists the sizes of marbles a particular manufacturer had available at the time it was printed though. They usually reference the standard numbering system for marble sizes that most American manufacturers used.

Wow, TJ, so the OP is an Akro. I have never seen another like it, and I sure am looking forward to seeing the one you plan to post!

Way to lean!

I'll stick with my original thoughts on those.

Thanks Chad, I appreciate the education. It is as I expected - maybe I'm finally starting to figure the old Germans out. 🙂

Cool, your yard/lot must have been a pretty popular play place!

@supramisfit Nice marbles - "Sahuaro" is really neat!

You are really close with the MK "Boy Scouts", most folks call them Cub Scouts, since blue and yellow are the dominant colors of their uniforms, and the bit of orange on the one is not too unusual. Making making machine made marbles is not exactly a precision process and having a bit of extra color is not uncommon, especially with MK. The black/yellow/white ones look modern and foreign to me, maybe Mexican or Asian. I can't really see much of the green/yellow/black one - it might help if we could see the ends of the ribbons.

Another beautiful set, David. I'd love to see a couple of close-ups of the pinched pontil on these.

That's a pretty one, Chad! Would those be considered "English" colors?