Henry Archer AkvavsSinn U18

Owners widely praise the Henry Archer Akva for its excellent build and finish quality, compact 40mm dimensions, and versatile no-date dial, with many finding its timekeeping perfect. The watch's blue wave dial and slender design are frequently highlighted as particularly attractive features, and the bracelet with on-the-fly adjustment receives positive remarks. Some owners note the Miyota movement and find the Akva's aesthetic comparable to significantly more expensive timepieces. However, reviewers consistently flag the bezel action as slippery with strong ratcheting, and one owner disliked the available bracelet option. Overall, owners rate the Henry Archer Akva highly for its impressive build quality and attractive wave dial at its price point.

The Sinn U18 is praised for its unique deep blue/green dial with three-dimensional oxygen bubbles that change with light, and its comfortable, easily adjustable bracelet. Owners find the watch stunning and a piece of history, appreciating the refined hands. The Sinn U18 features a 44mm, 15.5mm thick case made from German submarine steel, offering a 2000-meter dive specification and Sinn's Ar-Dehumidifying technology, powered by a Sellita SW300-1 movement. The case thickness is apparent, and the watch comes as a complete set with box and papers for $3,000-$3,680. On balance, owners and reviewers rate the Sinn U18 highly for its striking dial and robust build.