Airain Watches Type 20vsSeiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

Owners widely praise the Airain Watches Type 20 for its beautiful and faithful recreation of a classic model, highlighting its easily wearable 39mm case sizing and the pleasure of its manual winding movement. Reviewers note the pleasing "old radium" lume and the vintage military watch experience offered by modern construction. Some owners find the design timeless and clean, with one owner calling it "just perfect." However, reviewers point out that the vintage-style sapphire crystal can add glare, and the case is still considered a bit thick despite the manual movement. Strap hardware required swapping between included straps for one reviewer. One owner noted a small scratch on the crystal near the 12-hour mark. The movement's appearance is considered less attractive than many hand-wound chronographs by one reviewer. On balance, owners and reviewers rate the Airain Watches Type 20 highly for its faithful vintage design and enjoyable manual winding action.

Owners widely praise the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition for its attractive, well-made design and gorgeous dial, noting its jewel-toned teal color and rippling-water pattern. The bezel action is smooth with a muted sound, and the case and bracelet offer a more comfortable feel than previous iterations. However, multiple owners express disappointment with the accuracy of the 6R movement at its price point, with some noting theirs runs slow, and consider the price too high. The steep rehaut and marker size make the 24-hour numbers difficult to read, and some find the case design makes the watch feel top-heavy despite wearing smaller. Overall, owners rate the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition highly for its striking dial and refined case design, despite concerns regarding movement accuracy at its price.