
39 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Borealis Watch Co. Sea Storm MK2 GMT is the Seiko Monster ($550) — common cross-shop and Pro diver. If price is the constraint, the Swatch Sistem51 Hodinkee Generation at $170 (vs $415 for the Sea Storm MK2 GMT) covers most of the same brief. From the independents, the Manufaktur Waldhoff Atlas GMT is the standout microbrand take — shared caliber (Seiko NH34) and Pro diver. Stepping up, the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch ($1,700) 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.