.925 Sterling Silver Cage / ATLANTIS Crystal Liquor Whiskey Square Decanter Rare

Stamped .925 Art Nouveau Sterling Silver filigree Cage over ATLANTIS Crystal Decanter This is a rare and beautiful, hard to find treasure glassware with decorative sterling silver overlay. Overall ~ 8 3/4" tall" to top of the stopper. Stamped MG&SA (?), 925 and 2 letters or symbols I don't recognize, please view photo closeup to see them. The silver overlay is most likely made in Portugal. The set is in pristine, near mint condition, with teeny bit wear to bottom underside. ⚽꧂✨ luxurious precious metal highly collectible ...⚽꧂✨