BEVERLY HILLS, Calif.--(BUSINESS WIRE)--Superior Galleries, Inc. (OTCBB:SPGR - News), which wholesales, retails and auctions rare coin products via traditional and Internet channels, today announced that it has executed an amended and restated agreement to be acquired by DGSE COMPANIES, INC. (Nasdaq:DGSE - News) and a management agreement with DGSE's acquisition subsidiary to manage the day-to-day operations of Superior. . . .
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