This is the GM-5600-1JF. I'm selling it because I don't have a chance to use it. The bezel has the usual minor scratches from normal use, but I think it's in good condition because I've taken good care of it. Operation has been confirmed, and it comes with the original box. There is no instruction manual. The combination of metal and band is popular. Here's the product description: From the G-SHOCK "5600 series," which continues to evolve in pursuit of toughness, comes a model that uses metal materials. By using resin material inside the case and hard stainless steel material for the bezel cover, we have achieved a high-quality feel while maintaining a light and comfortable fit. In addition, the use of a reverse LCD gives it a more chic finish. This 5600 series has inherited the concept from the first generation, pursuing the quality of a watch and refining the exterior and wearability. A stylish CASIO G-SHOCK wristwatch with digital display and shock resistance. - Brand: CASIO - Model: G-SHOCK - Color: Silver/Black - Material: Resin band/Stainless steel case - Features: Digital display/Shock resistance Thank you for looking.