Finding alternatives to
Seiko Prospex Sea
42 watches that match on case size, movement family, and price band. Sorted by how close the match is.
Case
43.8mm
Movement
Automatic
Category
Diver
MSRP
$625
The short answer
The closest alternative to the Seiko Prospex Sea is the Seiko Prospex Sea PADI Special Edition ($625) — shared caliber (Seiko 4R35) and Same family (Prospex Sea). If price is the constraint, the Swatch Sistem Slate at $250 (vs $625 for the Prospex Sea) covers most of the same brief. From the independents, the Spinnaker Hass Automatic is the standout microbrand take — common cross-shop and Pro diver. Stepping up, the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition ($3,300) is where the same idea goes with a bigger budget.
ColourwayPick a colourway to match a specific dial
42 matches
Microbrand picks· 12
Independent makers covering the same brief — usually with something the mainstream brands don't.
Mainstream picks· 12
Established brands covering the same brief at a comparable price — same case size, similar movement family. Often the deciding click for a new buyer.
Cheaper alternatives· 6
If the price is the only thing keeping you off this watch, these get you most of the way there for less.
Pricier alternatives· 12
Where the same idea goes when budget isn't the constraint — luxury upgrades and step-ups.
