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There is no single Seamaster specification to beat: the name covers several families, including the Diver 300M, Seamaster 300 and Planet Ocean. Pin down the exact reference before comparing price, size or movement. As specification-based alternatives, the Longines HydroConquest, TAG Heuer Aquaracer Professional 300 Date, Rolex Submariner, Oris Aquis Date and Tudor Black Bay 58 cover distinct price and size choices. The figures below are manufacturer-page details observed on October 12, 2026; prices are US listings and can change.
Start by choosing the Seamaster benchmark
A fair comparison depends on the specific OMEGA Seamaster reference. The Diver 300M, Seamaster 300 and Planet Ocean are different watches, so a general “Seamaster” comparison cannot establish like-for-like differences in price, dimensions, water resistance or movement. OMEGA’s product page could not be verified for this guide, so no Seamaster specification or price is asserted here.
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Use the reference number on the watch or listing to identify the exact model, then compare its current regional price and manufacturer specifications with the alternatives below. The candidates are shortlisting options, not a hands-on ranking.
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Five alternatives, and what each offers on paper
| Watch and reference | Manufacturer-listed details | Observed US price | Why consider it |
|---|---|---|---|
| Longines HydroConquest L3.781.4.56.6 | 41 mm; automatic; ceramic bezel; date; up to 72-hour reserve; 30 bar/300 m; bracelet | $2,000 (Longines, October 12, 2026) | A lower-listed-price automatic option with a 300 m rating and date. Longines specifications and US listing. |
| TAG Heuer Aquaracer Professional 300 Date WBP5116.BA0013 | 42 mm steel automatic; COSC-certified TH31-00; 80-hour reserve; date; ceramic bezel; 300 m | $4,550 (TAG Heuer, October 12, 2026) | A date-equipped 300 m option with the longest stated reserve among the movements detailed here. These figures apply to this specific green-dial reference. TAG Heuer specifications and US listing. |
| Rolex Submariner 124060 | 41 mm Oystersteel; black ceramic Cerachrom bezel; 300 m; calibre 3230; approximately 70-hour reserve; no date; Glidelock bracelet extension | $10,050 (Rolex, October 12, 2026) | A no-date 41 mm choice with an adjustable bracelet extension. Rolex specifications and US listing. |
| Oris Aquis Date 01 733 7789 4157-07 8 23 04PEB | 43.50 mm; 30 bar; automatic calibre 733-1; 41-hour reserve; ceramic bezel insert; 23 mm interhorn width | $2,600 (Oris, October 12, 2026) | The largest listed case among the detailed references in this table. Oris also lists an optional matching green rubber strap at $383; confirm fit and current price. Oris specifications and US listing. |
| Tudor Black Bay 58 collection | 39 mm variants listed; exact variant specifications are not established here | $4,975 for a rubber-strap variant; $5,225 and $5,350 for steel-bracelet variants (Tudor, October 12, 2026) | Consider it if you want a smaller listed case, but verify the exact variant’s dimensions, movement and other specifications before comparing. Tudor collection and US listings. |
Prices are snapshots of different official US pages, not a complete market survey or a guarantee of current availability. They do not establish the price gap against an OMEGA because the exact Seamaster benchmark and its current regional price have not been verified.
#1 Best Overall
- COMPACT DIVE WATCH PERFORMANCE: The 39mm case offers a versatile size ideal for smaller wrists or those preferring a lightweight, low-profile dive watch without sacrificing function or style.
- STRIKING GOLD-TONE DESIGN: Features a gold-tone stainless steel case and bracelet with a radiant white dial, blending luxury appeal with rugged dive-watch capability.
- 200M WATER RESISTANT: Built to ISO 6425 dive standards with 200 meters of water resistance, unidirectional bezel, and screw-down crown—ready for water sports and daily wear.
- ALWAYS VISIBLE TECHNOLOGY: Luminox Light Technology ensures 24/7 glow for up to 25 years—no external light source or recharging needed—ideal for night use or low-light environments.
- RELIABLE SWISS MOVEMENT: Equipped with a Swiss Quartz movement for precise, dependable timekeeping, making it suitable for everyday wear, travel, or active outdoor use.
How to narrow the shortlist
Set a realistic price range
Among the cited US listings, the HydroConquest is $2,000, the Oris is $2,600, the Aquaracer is $4,550, and the no-date Submariner is $10,050. The Tudor collection lists variants between $4,975 and $5,350. Those page prices are reference-specific and may change; check the current listing in your region before deciding.
Compare fit using more than diameter
The cited case diameters run from 39 mm for Tudor Black Bay 58 collection variants to 43.50 mm for the Oris, with the Longines and Rolex at 41 mm and the TAG Heuer at 42 mm. Diameter alone does not predict how a watch will sit on your wrist. Lug-to-lug length, thickness, wrist shape, bracelet articulation and clasp adjustment also matter, and the cited product pages do not provide a complete cross-model fit comparison. Try the exact reference on if possible.
Rank #2
- Stainless steel case 43mm diameter x 12mm thick; Black dial; Luminous hands and hour markers
- Japanese quartz movement, PC32 Caliber; Assembled in Japan; SR626SW battery included; Watch weight: 170 grams
- Stainless steel band, 185mm L x 22mm W; Band is adjustable by adding/removing links; Fold over safety clasp
- Flame Fusion crystal; Screw down crown; Uni-directional stainless steel bezel with black top bezel ring; 100 meter water resistant: Suitable for recreational surfing, swimming, snorkeling, sailing and water sports. Not suitable for diving
Choose the functions you will actually use
The Submariner 124060 has no date; the listed Longines, TAG Heuer and Oris references have one. Think about whether a date display matters to you, then compare the dial, bezel and bracelet of the exact variants. The listed specifications do not support a comfort, legibility or finishing ranking.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesRead water-resistance ratings in context
The Rolex and TAG Heuer pages state 300 m, Longines describes its rating as 30 bar/300 m, and Oris specifies 30 bar. These are manufacturer ratings, not a hands-on assessment or a complete measure of practical suitability. Do not choose between watches on the depth figure alone.
Rank #3
- Stainless steel case 40mm diameter x 14.1mm thick; Exhibition case back; Black dial; Luminous hands.Band Length: 205mm
- NH35A Japanese Automatic movement, 24 jewel; Assembled in Malaysia; Watch weight 155 grams
- Includes gift box, instructions and 3 year limited manufacturer warranty; Invicta Customer Service can be reached at 1-800-327-7682 for questions (re: Additional links, band replacement, band adjustment, warranty questions, etc.)
Treat reserve as one specification, not a quality score
The cited pages state approximately 70 hours for Rolex calibre 3230, up to 72 hours for the Longines automatic, 80 hours for TAG Heuer TH31-00 and 41 hours for Oris calibre 733-1. Reserve describes how long a fully wound movement is specified to run; by itself it does not establish accuracy, durability or service cost.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to verify before buying
- Exact reference: Match the reference number, dial, bezel, strap or bracelet and case size to the product you intend to buy. Collection pages can include multiple variants.
- Current local price: Confirm the listing in your country and currency. The figures here are observed US manufacturer-page prices dated October 12, 2026, not enduring or worldwide prices.
- Full dimensions and fit: Check lug-to-lug length and thickness, and assess the bracelet or strap on your wrist where possible.
- Purchase terms: Confirm availability, seller and warranty terms directly with the retailer before placing an order.
For model discovery, WatchTime’s alternatives roundup also names the Black Bay 58, Aquaracer Professional 300 Date and HydroConquest, and mentions the Breitling Superocean Heritage. That is editorial context rather than authoritative technical data; verify any contender’s exact reference and specifications with its manufacturer.
Quick Recap
Best Value
- The Seastrong Heritage model is inspired by the 1960’s professional diver design, a beautiful re-issue of this historic model. This timepiece features an automatic movement with a 60-minute internal rotating bezel. It also has a textured rubber strap, vintage white and black dial, screw down crown and an engraved caseback to protect the movement from everyday elements.
- 300M water resistant with uni-directional turning 60m diving bezel
- AL-525 Caliber - Automatic Self-wind Movement, 26 jewels, 38 Hours Power Reserve
- 42mm Case Diameter with Polished Stainless Steel Case
- Scratch Resistant Sapphire Crystal
Rank #4
- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
