Seiko Prospex Sea Save the Ocean Special EditionvsUndone Aquadeep Signal Automatic

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its attractive, unique, and textured dials, often described as having a "Grand Seiko feel" at a more accessible price point, with specific mentions of wave patterns, lagoon hues, and manta ray motifs. Owners appreciate the smooth bezel operation and satisfactory lume. Accuracy figures vary, with one owner reporting +5 seconds per day, while another notes a range from +1/+2 to about -6 seconds per day. The 6R35 movement offers a 70-hour power reserve, and some models feature sapphire crystals. Criticisms include a desire for exhibition casebacks and concerns about the quality and security of the stamped metal clasps and bracelets, which are frequently described as rattly or underwhelming, though this is noted as a common Seiko trait. Some owners are split on the number of Save the Ocean variations and dislike the cyclops magnifier.

Owners report the Undone Aquadeep Signal Automatic delivers solid build quality and reliability, with the NH35 movement earning consistent praise within the microbrand community for its dependable performance. The 43mm case and 500m water resistance appeal to those seeking a capable dive watch at accessible pricing. However, customer service and warranty handling have emerged as a significant pain point — one owner faced a falsely claimed delivery and order cancellation refusal, while another experienced water ingress that was not honored under warranty, contrasting sharply with owners who express genuine affection for the brand and maintain collections of its watches. Overall, the Aquadeep Signal Automatic is valued by its supporters for reliable timekeeping and finishing at the price, though prospective buyers should be aware of inconsistent post-sale support.