
48 watches that match on case size, movement family, and price band. Sorted by how close the match is.
The closest alternative to the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch is the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation ($2,800) — shared caliber (6L37) and Same family (Prospex Marinemaster). If price is the constraint, the Tissot Seastar 1000 at $875 (vs $2,800 for the Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch) covers most of the same brief. From the independents, the Boldr Odyssey 40mm is the standout microbrand take — common cross-shop and Pro diver.
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.