
40 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Seagull Ocean Series 200m Waterproof GMT Dive Watch 43.5mm is the Orient Kanno ($320) — tool diver and Looks nearly identical. If price is the constraint, the Swatch Sistem51 Hodinkee Generation at $170 (vs $429 for the Ocean Series 200m Waterproof GMT Dive Watch 43.5mm) covers most of the same brief. From the independents, the Seagull Ocean Series Pro "Dragon Kings of the Four Seas" Dragon-scale Dial 300m Waterproof Diving Watch 44mm is the standout microbrand take — shared caliber (Seagull ST2130) and Tool diver. Stepping up, the Fortis Marinemaster M-44 ($5,120) 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.