
39 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the San Martin SN0138G 37mm ST2130 Vintage Diver Watch is the Orient Diver Design 40 ($395) — common cross-shop and Skin-diver style. If price is the constraint, the Seiko 5 SNKK27K1 at $133 (vs $273 for the SN0138G 37mm ST2130 Vintage Diver Watch) covers most of the same brief. From the independents, the Seagull Ocean Series 200m Metallic Gradient Dial Calendar Dive Watch 39mm is the standout microbrand take — shared caliber (Seagull ST2130) and Skin-diver style. Stepping up, the Glycine Unisex Combat Sub 36mm Automatic Watch GL0338 ($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.