Seiko’s legendary 62MAS dive watch continues to influence modern watch design nearly six decades after its 1965 debut. Now, Seiko designer Masanori Kawamura has shared what his ideal dive watch would look like if budget, materials, and engineering limits were no obstacle.
His dream concept is not an official upcoming Seiko model, but the details are fascinating for anyone who follows Seiko Prospex, Marinemaster, or vintage-inspired dive watches. Kawamura’s imagined watch would combine classic 62MAS styling with modern performance, slimmer proportions, and a movement built for serious endurance.
At the heart of the concept is a movement with more than five days of power reserve. That alone would put it ahead of many current Seiko dive watches, especially in a compact case. Kawamura would place that movement inside a 38 mm case measuring less than 11 mm thick, creating a dive watch designed for everyday comfort rather than oversized wrist presence.
That size is especially interesting when compared with recent 62MAS-inspired Seiko models. The updated reissue case measures around 40 mm wide and 13 mm thick, meaning Kawamura’s dream version would be both smaller and noticeably thinner. For collectors who love the clean shape of the original 62MAS but want a more wearable modern interpretation, those dimensions would likely be very appealing.
Kawamura’s design vision keeps the rugged simplicity of the original 1965 diver while refining nearly every detail. He would use optimized materials to improve both strength and lightness, making the watch more comfortable without sacrificing durability. The goal is not simply to create a high-spec tool watch, but to build something practical enough to wear every day.
The bezel would also receive attention. Kawamura described a thinner bezel with smoother operation, giving the watch a cleaner appearance while preserving the functionality expected from a proper dive watch. This detail would help emphasize the balanced proportions of the case and make the overall design feel closer to the elegant simplicity of the vintage 62MAS.
Another standout idea is the use of Arabic numerals inlaid directly into the dial. Instead of printed or applied markers, inlaid numerals would improve durability and add depth to the dial design. It is a subtle but premium detail that could give the watch a stronger identity while keeping the layout clear and legible.
Kawamura would also choose a box-shaped curved sapphire crystal, a feature that blends vintage character with modern scratch resistance. A box sapphire crystal can recreate the warm profile of older acrylic crystals while offering the toughness expected from a modern Seiko dive watch.
Magnetic resistance is another area where the concept pushes beyond current models. Kawamura wants stronger anti-magnetic protection than present Marinemaster references, which would make the watch more resilient in daily life. From phones and laptops to speakers and bags with magnetic clasps, modern environments expose mechanical watches to more magnetism than many owners realize.
What makes this concept compelling is that it does not chase extreme specs for the sake of it. Kawamura’s ideal Seiko diver is about balance: compact size, long power reserve, strong durability, improved magnetic resistance, and vintage-inspired design. It reflects a direction many enthusiasts have been asking for: smaller, thinner, technically advanced dive watches that still feel true to Seiko’s heritage.
However, it is important to keep expectations realistic. Kawamura was answering a hypothetical question, not announcing a future product. There is no confirmation that Seiko is developing this exact watch, and the specifications remain a designer’s wish list rather than a production plan.
Still, the concept offers a rare glimpse into the thinking of a designer involved with Seiko’s modern dive watch lineup. If Seiko ever manages to combine a sub-11 mm case, 38 mm diameter, five-day power reserve, 62MAS-inspired design, box sapphire crystal, and enhanced magnetic resistance, it could become one of the most desirable modern Seiko Prospex dive watches yet.
For now, Kawamura’s dream watch remains imaginary. But for Seiko fans, vintage diver collectors, and anyone hoping for a slimmer next-generation 62MAS-style model, it is an exciting vision of what the future could look like.
