Gruen Crystal Watch - Etsy。​Title: Vintage Gruen Hidden Dial \"Secret Watch\" Bangle – Full Collector Set ​Condition: Excellent / New Old Stock (NOS) style. This watch is in pristine cosmetic condition and has been fitted with a brand-new battery. It is currently running and keeping perfect time. ​Model Details: This unique Gruen model (GR7423) features a \"peek-a-boo\" design with a large, faceted blue faux-gemstone cover that hinges open to reveal a rectangular white dial. The dial is accented with a genuine diamond marker at the 12 o’clock position. ​Specs: ​Movement: Japanese Quartz (Fresh battery installed – Working Perfectly) ​Case/Band: Gold-tone fluted bangle with a secure hinged closure. ​Dial: Rectangular white face with \"diamond\" accent. ​Included: Original Gruen cream-colored hardshell box and lifetime warranty papers. ​Year of Manufacture: Circa 1995–1999. This piece is a classic example of late-90s fashion watch design from the MZ Berger era of the Gruen brand.