Here is an excellent example of a ladies “Cartouche Model 186” timepiece, set within a finely engraved 14kt Solid White Gold & Diamond case and dating to ca 1928. Beautifully engraved art deco rectangular case with a high quality diamond (Gruen only used the best) at each corner. Very understated and elegant. 15mm x 27mm. The white dial with black Arabic expanding numerals is in clean and beautiful condition with clean and very visible blued steel hands. Inside we find a clean and higher-grade Fifteen Jewel Gruen movement that is signed GRUEN GUILD, SWISS – FOUR 4 ADJ., FIFTEEN 15 JEWELS with the caliber number “155” stamped below the balance wheel. The inside of the case lid is stamped GRUEN 14K CINCINNATI – 155/66 with case reference number below. Please note how the mechanism’s caliber number (155) is repeated on the case lid while the 66 is the dial model number. We have just serviced this fine movement and it is operating properly and keeping good time. Fitted with a new padded black leather strap.