TAG Heuer 1500 Series Professional 200M (Reference WD1223-G-20). This is a sought-after vintage Swiss-made diver's watch manufactured primarily during the 1990s.

•  TAG Heuer 1500 Series (often described as a design bridge blending the robust aesthetics of the 1000 series and the refined curves of the 2000 series).

• Reference Number: WD1223-G-20 (also found as WD1223-G or WD1223). 

• Case Size: 37mm (mid-size/unisex profile, wears exceptionally comfortably on a wide range of wrist sizes). 

• Movement: Reliable high-grade Swiss Quartz (typically powered by an ETA 7-jewel quartz base). 

• Dial & Colorway: Dark granite-textured Blue Dial with a matching blue unidirectional rotating elapsed-time bezel.

• Materials ("Two Colors"): Two-tone (Bi-metal) styling combining Stainless Steel and Gold Plating across the case accent elements, crown, and the signature jubilee-style bracelet links. 

• Functionality: Water resistant up to 200 meters (20 ATM) featuring a quick-set date window at the 3 o'clock position, a protective scratch-resistant sapphire crystal, a screw-down crown, and highly luminous Tritium/Mercedes-style hands.