Citizen Promaster Geo TrekkervsYema Diver

The Citizen Promaster Geo Trekker is widely praised for its sophisticated Eco-Drive technology and radio-controlled timekeeping, offering excellent time, day, and date functionality. Owners appreciate its rugged, aviation-inspired design, with a striking 46mm stainless steel case that remains easy to read and a calculator ring that serves as a conversation starter. The watch features a scratch-resistant sapphire crystal and a solid bracelet with a mix of finishes, powered by the Eco-Drive Cal. H864 movement with a 2.5-year power reserve and perpetual calendar. While the slide rule bezel is complex, the overall functionality and build quality are considered strong for its $795-$850 price point. On balance, owners and reviewers rate the Citizen Promaster Geo Trekker highly for its advanced technology and distinctive, functional design at the price.

One owner reported a water ingress issue on their Yema Diver the first time it got wet in a lake, despite rinsing and inspecting the watch and bezel. Another owner notes this manual wind Yema Diver has a cool patina but is unlikely to be waterproof or gain value. Overall, owners view the Yema Diver as a fun second watch rather than an investment.