First, as you all probably know, but it bears repeating, four guys left Akro and started their own company Master Made Marbles. They must have left on good terms because the two companies swapped manufacturing and marketing under the other company's label for a short while. This helps add to the the necessary amount of confusion in the who made what game. I don't know this but somewhere I think I read that these guys also left with some of Akro's machines. They made marbles through the 30's and 40's and in the early fifty's the import trade slowed the market enough that three of the four left Ira whats-his-name with the company. Ira made Master Glass marbles but sold them initally in MM boxes. Ira's marbles were mostly pretty dull patches, ie, brushed white on translucent blue sorta thing. Things continued going down hill and Ira died mid-fifties with MG going out of business at about the same time.
Earlier MM are notable for their effort to duplicate the German onionskin and are the most attractive, some being difficult to distinguish from Akro's Sparklers. Generally the more colors the more value. Lacking white also raises the value. There are some unusal color combinations but you would have to see each one in had to see if the hue was "different" from the norm. MG for the most part are IMHO barely collectible.
A question I have - has anyone seen them in any other than 5/8-11/14" size.
Bo should follow me shortly here and correct everything I've said LOL
As for my mibs and particularly MMs they are all in a big plastic tub still in storage, after the move, after the divorce, after the doctors - you get the picture.
I'll try to get them out and shot a few pics before this thread goes away.
John