
40 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Seiko Prospex Sea Save the Ocean Special Edition is the Seiko Monster ($550) — shared caliber (4R36) and Same family (Prospex Sea). If price is the constraint, the Swatch Sistem Sea at $170 (vs $550 for the Prospex Sea Save the Ocean Special Edition) covers most of the same brief. From the independents, the Zelos Blacktip 41 is the standout microbrand take — common cross-shop and Pro diver. Stepping up, the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition ($1,750) is where the same idea goes with a bigger budget.
Independent makers covering the same brief — usually with something the mainstream brands don't.
Established brands covering the same brief at a comparable price — same case size, similar movement family. Often the deciding click for a new buyer.
If the price is the only thing keeping you off this watch, these get you most of the way there for less.
Where the same idea goes when budget isn't the constraint — luxury upgrades and step-ups.