Citizen Eco-Drive OnevsKUOE OLD SMITH 90-001

The Citizen Eco-Drive One is widely celebrated for its groundbreaking thinness, with multiple sources confirming its status as the world's thinnest light-powered watch, measuring between 2.98mm and 3.5mm. Owners and reviewers alike praise its exceptional lightness, titanium construction, and good build quality that avoids feeling flimsy, noting its "wow factor" and superb finishing. The watch features a proprietary, ultra-thin Eco-Drive quartz movement and a synthetic sapphire dial, with some models offering up to 12 months of power reserve. However, its high price, ranging from $3,500 to $5,000, is a significant drawback for some, and its aesthetic is considered too plain or dated by a minority who prefer other Citizen models. The Citizen Eco-Drive One is also noted for lacking a seconds hand and having only splash-resistant water protection.

KUOE OLD SMITH is widely praised for its vintage aesthetic and comfortable 35mm wearability, with owners noting its attractive bronze case and dial contrast. Reviewers and owners alike highlight its excellent accuracy. However, the case finishing is considered average for the price, and the lume fades quickly. Some find the small date window difficult to read, and the Seiko NH38 movement is described as noisy. The 18mm lug width and PVD-coated strap hardware are also noted as drawbacks. Overall, owners and reviewers find the KUOE OLD SMITH to be a compelling vintage field watch offering good value, particularly for its aesthetic appeal and accuracy.