Skip to content
Model guide

Omega Seamaster

Omega Seamaster is a collection rather than one like-for-like product. Choose the correct family below for cleaner listings, reference-led selling-price history and more meaningful market comparisons.

Choose your Seamaster family

Diver 300M, Aqua Terra, Planet Ocean, Seamaster 300 / Heritage, Ploprof and older classic Seamaster watches each have their own market. Where a listing cannot be identified safely, AWatchADay keeps it in the wider Seamaster collection rather than guessing.

Dive watch

Omega Seamaster Diver 300M

The Omega Seamaster Diver 300M includes modern ceramic references and earlier Professional/Bond-era generations. Exact reference matters because movement, size, bezel, bracelet and dial specification vary substantially across generations.

View family and live listings

Luxury watch

Omega Aqua Terra

The Omega Seamaster Aqua Terra is a distinct everyday sports-luxury family with its own reference generations, sizes and movements. It should be compared separately from Diver 300M and Planet Ocean watches.

View family and live listings

Dive watch

Omega Planet Ocean

The Omega Seamaster Planet Ocean is a heavier-duty dive-watch family with distinct 600M generations, movements and case sizes. Legacy 2200/2201 references and modern 215/232 references belong in this market rather than the generic Seamaster pool.

View family and live listings

Other or not-yet-identified Omega Seamaster watches

These listings are kept in the parent collection until there is enough evidence to assign them safely to a child family.

Your Marketplace Choose the UK or USA marketplace you want to search.
26 current matchesShowing watches physically located in the UK.

Affiliate disclosure: Links marked * may earn AWatchADay.com a commission at no extra cost to you. Read our affiliate disclosure. Prices and availability can change. Eligible eBay listings may display Authenticity Guarantee; check the individual listing and current eBay terms.

More Omega watch guides

Field & Sports

Omega Aqua Terra

The Aqua Terra is Omega’s versatile everyday Seamaster, balancing water resistance and sport-watch durability with cleaner dials, multiple sizes and dressier bracelet or strap options.

Field & Sports

Omega Vintage / Classic Seamaster

Vintage and classic Omega Seamaster watches cover earlier dress, everyday and pre-modern sports references that do not belong in today’s Diver 300M, Aqua Terra, Planet Ocean, Heritage or Ploprof families.

Field & Sports

Omega Railmaster

The Railmaster is Omega’s understated anti-magnetic, railway-inspired sports watch, valued for its simple dial design and less ubiquitous presence than the Seamaster or Speedmaster.