westcoast_dave Posted November 25, 2014 Report Share Posted November 25, 2014 Looking for some good information on production start dates for Akro Sparkler marbles. (or at least some good discussion). Particularly interested in when the injection method of marble manufacture (if thats a proper term) was introduced at Akro. Patent info, box info and any insight into these marbles is greatly appreciated. Link to comment Share on other sites More sharing options...
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