This is a limited edition DW-8200K-8 from the Casio G-SHOCK FROGMAN series. This model was released in 1996 to commemorate the 5th International Dolphin and Whale Conference, and is known as one of the "イルクジ" (Iru Kuji - Dolphin and Whale) models. Design: It has the sub-name "The Ocean" and features a semi-transparent (skeleton) material that evokes the image of a majestic whale. Material: As engraved on the bezel, rust-resistant titanium material is used. Functions: It is a full-fledged diver's watch compliant with ISO standards, with 200m water resistance, and can measure dive time, etc. Backlight: When the light is turned on, a whale silhouette appears on the LCD. It is a used item, but in good condition. The battery is dead. I am not familiar with the details, so everything in the images is included. Thank you for your consideration.