Ecozilla

The Citizen Ecozilla is a cult favorite among dive watch collectors, renowned for its unapologetically bold 48mm case and purpose-built design. Originally developed to withstand the rigors of professional diving, the Ecozilla quickly earned its nickname thanks to its massive, almost playful proportions and distinctive shroud. Its place in Citizen’s lineup is unique—few other models combine this level of wrist presence with true ISO-certified dive capability.

Reference numbers like BN0000-04H (quartz, rubber strap) and BJ8050-08E (Eco-Drive, rubber), as well as the BJ8050-08E (Eco-Drive, stainless bracelet) are the ones to know. The Eco-Drive solar movement is a selling point, offering maintenance-free reliability and eliminating battery changes—something practical for a tool watch. Water resistance is rated at 300 meters, and the left-side crown and chunky bezel are functional choices that drive home its tool-watch credentials.

Price variations typically come down to condition, original strap/bracelet, and whether the proprietary Citizen adapter is included—important for swapping straps, as the unique lug design limits aftermarket options. Earlier models with complete kits and uncut straps tend to fetch a premium. This model doesn’t have widespread issues with counterfeits, but collectors value full sets and unmodified cases. If you want a statement dive watch that’s as much fun as it is functional, the Ecozilla delivers.