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Old swirl


Robwell

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I agree a good chance of Jabo based  on both size and pattern.   

That  would put it after 1990.

With an Alley (the most likely older candidate for a 1" marble) the swirl pattern would tend to be crisper.  It would be easier to see what color was the ribbon and what color was the base.   

Robwell, what led you to think it would be old?

 

The crease you're showing in the first two photos is called a "cold roll".  The marble was just a little bit too cool to for the molten glass to be completely smoothed out on its ride down the rollers. 

 

 

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Every machine made marble is cut twice which is two shear marks per marble. Sometimes the cut line or shear mark shows and sometimes does not show.  This depends on at least two or three different factors.  How hot the glass is. The space between the holes of the shear blade. The alignment of the glass stream entering the shear. Plus more. Your marble has a roll mark,  a flaw, which can be caused by probably 10-25 different problems that can occur.  Your marble has two colors, white base and light rose or light maroon was added for the swirl. It is a modern machine made marble, no 9 twist left or right. The 9 twist is hand gathered marbles only.  When the punty rod is twisted to gather the glass, it can make a 9 twist. We can only see one pole. Both pictures are the same, just one closer, same pole in each picture. Have no idea what the mark may be on the pole we cannot see. Probably another roll mark or cut line. If it shows two cut lines well, it may not be a Jabo ? Some Jabos show cut lines, but the vast majority of Jabos show no cut line. Multiple views of a marble is much needed for a accurate id. But those multiple views should be of different sides, angles, or both poles.  The shear mark or cult line showing on this marble is on the left side from 11 o' clock down to 7 o 'clock.  The marble may be a late Vitro or a Jabo. It is probably 7/8 inch size. If it shows two nice cut lines, it is more likely a Vitro and probably made about 1985-86. Value is about 50 cents to $1.00. 

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