
48 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Marathon OSAR-D (Original SAR with Date) Automatic 36mm is the Seiko Prospex Sea 1965 Heritage Diver's Watch ($1,300) — common cross-shop and Pro diver. If price is the constraint, the Orient AC0Q-40 Diver Watch at $370 (vs $1,200 for the OSAR-D (Original SAR with Date) Automatic 36mm) covers most of the same brief. From the independents, the Borealis Watch Co. Bull Shark V2 is the standout microbrand take — common cross-shop and Pro diver. Stepping up, the Fortis Marinemaster M-40 ($3,520) 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.