The Seamaster Diver 300M is the watch most people picture when they think "Omega diver," and the modern generation has a broad, active resale audience. The key is to identify which version you have, because they aren't all specified the same way.
Free insured postage. Written valuation. Paid in 72 hours.
The short answer
To sell an Omega Seamaster Diver 300M, identify the version first — most standard 42mm date models use the Co-Axial Master Chronometer calibre 8800, while the titanium "No Time To Die" 007 edition is a separate no-date watch with the calibre 8806. Fair Vintage confirms the reference and movement from the watch, grades the ceramic bezel and dial and the bracelet, values the box and papers, and gives a free, no-obligation valuation. It's an entirely postal service from Bedfordshire, with fully insured postage and payment by bank transfer within 72 hours of you accepting.
The current Diver 300M generation launched in 2018 in a 42mm case with 300m water resistance, a ceramic bezel and a laser-engraved ceramic wave dial. But not every modern Diver 300M shares the same movement — so identifying the exact version matters to the figure.
The standard date models are powered by the Co-Axial Master Chronometer calibre 8800, with a helium escape valve, on either a steel bracelet or a rubber strap. Dial colours across the range include blue, black, grey and green.
A separate watch — grade-2 titanium, a brown "tropical" aesthetic, a no-date dial and the calibre 8806, supplied on a striped NATO-style strap. Its configuration and audience differ from a standard steel 42mm.
Omega has produced other James Bond commemorative editions over the years. These are worth calling out because their configuration differs from a standard steel 42mm — but only when it's genuinely the watch you own.
Send us the reference and a few photos and we'll confirm the exact model, movement and configuration before you send anything. Getting the movement right — 8800 or 8806 — is central to an accurate valuation.
Condition of the ceramic bezel and dial (both are hard-wearing but not immune to damage), bracelet stretch, whether the watch has been serviced recently, dial colour and the completeness of the set. Titanium Bond editions are valued on their own terms rather than against the steel models.
Include the extras that came with the watch. Buyers like to see the pictogram tag, the box, and any spare rubber strap or bracelet links supplied with certain references. If you have the additional strap that came with your watch, include it.
Buyers like to see the Omega card or e-warranty details, the box, and any spare rubber strap or bracelet links supplied with the watch. If you have the pictogram tag or the additional strap that came with certain references, include them.
We buy Diver 300Ms without box and papers regularly. We'll identify the exact reference and movement from the watch and reflect any missing items clearly in the offer.
Send us the reference and a few photos and we'll come back with a free, no-obligation valuation. Accept it and we arrange a free, fully insured Royal Mail Special Delivery label; the watch is checked on arrival and paid by bank transfer within 72 hours. It's an entirely postal service run from Bedfordshire.
Getting the movement right — 8800 on a standard date model, 8806 on the titanium NTTD — matters to the price. A specialist prices the watch you actually own rather than a generic "Seamaster." For more background, see our guide to selling an Omega watch in the UK and where best to sell a luxury watch.
Exact version and movement identified. Condition graded honestly. Box and papers valued. Free insured postage both ways. No obligation — we return your watch free if you decline the offer.
Request a free valuation →Does every modern Seamaster Diver 300M use the calibre 8800?
No — standard date models commonly use the 8800, but the titanium No Time To Die edition uses the no-date calibre 8806.
Is the No Time To Die edition worth more?
It's a distinct titanium, no-date watch with its own audience; we value it separately from the steel 42mm models.
What's the ceramic wave dial and does damage hurt value?
It's the laser-engraved ceramic dial of the modern generation. It's durable, but visible damage to the dial or bezel is factored into the offer.
Do you buy the rubber-strap version as well as the bracelet?
Yes. We'll note which you have and whether spare straps or links are included.
Can I sell without the Omega card?
Yes — we confirm the reference from the watch itself and reflect the missing card in the valuation.
Does dial colour change the value?
It can influence demand, since some colours attract more interest than others, but condition and completeness matter just as much.
Also see: Sell Omega Seamaster · Sell Omega Planet Ocean · Sell Omega Speedmaster Moonwatch
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