Breguet Model BA-6090 Skeletonized 18K Wristwatch Purchased At Tiffany & Co. Excellent marked “750” (18K) yellow gold round very thin case with crystals on the front and back exposing the gilt engraved skeletonized movement with gilt dial signed “Breguet” and “Tiffany & Co.”, has black painted Roman hour numerals and black open moon hands; movement is stem wind and stem set with blue sapphire cabochon on the winding crown. Watch was purchased though Tiffany & Co., NY in 1988, has letter and receipts totaling $11,500 in 1984. Accompanied by original Blue Suede Tiffany box.