Omega · Seamaster Diver 300M · 42mm · steel and Sedna gold · black · bracelet · on Amazon
The two-tone Bond Seamaster in black. The cheapest gold Seamaster here.
This is the Seamaster Diver 300M at 42mm in steel and 18k Sedna gold: reference 210.20.42.20.01.001, a steel case with a Sedna gold bezel rim, crown and helium valve, a black ceramic bezel ring with a gold diving scale, a black ceramic dial with laser-engraved waves and gold markers, the date at six, on the steel and Sedna gold bracelet with a foldover clasp and diver extension. Inside is Omega’s co-axial calibre 8800, a Master Chronometer automatic with about 55 hours of reserve; 300 metres, 13.56mm thick, about 203 grams. The least expensive two-tone Seamaster on this page and well under Omega’s own price when read, from a marketplace seller on Amazon; the seller’s 11mm row is wrong.
Case
42mm, 13.56mm thick, 20mm lugs, 49.90mm lug to lug, steel with 18k Sedna gold bezel rim, crown and helium valve, black ceramic bezel ring with gold scale, sapphire caseback, 300m, about 203 g
Omega 210.20.42.20.01.001; listing: 42mm, 300m; rows say 11mm (wrong)
Movement
Omega co-axial calibre 8800, automatic, Master Chronometer (METAS), 55 h
Omega; listing description names the 8800
Dial
Black ceramic with laser-engraved waves, Sedna gold applied markers and hands, date at 6
Photograph; listing: black dial
Bracelet
Steel and 18k Sedna gold bracelet, foldover clasp with comfort setting and diver extension
Omega; photograph; listing: bracelet, 20mm
Reference
210.20.42.20.01.001
Listing title and model row
Seller
MS-TR JAPAN, marketplace seller; in stock; 30-day returns; condition not stated
Amazon buy box, 2026-09-14
Two-tone, and the price gap
The 2018 Seamaster Diver 300M in steel and Sedna gold is the same 42mm watch as the steel one, the laser-engraved ceramic wave dial, the ceramic bezel ring, the screw-in helium valve at ten and the calibre 8800, with the bezel rim, crown, valve and bracelet centre links in Omega’s rose-gold alloy. Sedna is Omega’s own 18k alloy with copper and palladium, chosen because it holds its colour. The gold scale on the ceramic bezel is what you notice first.
When read, this listing sat well under Omega’s own price for the reference, more than the gap on any other Seamaster on this page, and under the yellow gold twin on this page too. At about 203 grams on the bracelet it has the weight two-tone watches have. The rows say 11mm thick; Omega says 13.56.
Reading the listing
The listing carries the reference 210.20.42.20.01.001 in the title and model row and calls it a 42mm automatic chronometer with 300 metres, a helium valve and a 20mm bracelet, and names the calibre 8800 in its description; its 11mm row is wrong. The photograph shows the gold bezel rim, crown and valve, the black bezel with gold scale, the wave dial, the date at six and the two-tone bracelet. The thickness, lug width, lug to lug, weight, certification and reserve are Omega’s published figures for the reference.
The seller is MS-TR JAPAN, a marketplace seller, and the rows we read do not state whether the watch is new with Omega’s five-year warranty; ask, and ask for the box and card. Nothing here was measured on the watch.
Buying it on Amazon
This is a regular Amazon listing from a marketplace seller with Amazon’s 30-day return window; it is not a Luxury Stores pre-owned unit and the seller has not published a condition. The second button opens the live search for Seamaster Diver 300Ms in case this one has sold.
Seamaster Diver 300Ms have resold for under new and close to what pre-owned buyers paid, sometimes more, sometimes less; that is a pattern, not a promise, and nothing here is investment advice.
Specs
- Reference
- 210.20.42.20.01.001
- Case size
- 42mm, 13.56mm thick, 20mm lugs, 49.90mm lug to lug, about 203 g
- Case material
- Stainless steel with 18k Sedna gold bezel rim, crown and helium escape valve; unidirectional bezel with black ceramic ring and gold scale; sapphire caseback
- Movement
- Omega co-axial calibre 8800, automatic, Master Chronometer (METAS), 15,000 gauss
- Caliber type
- Omega 8800 co-axial Master Chronometer
- Crystal
- Domed sapphire, anti-reflective both sides
- Water resistance
- 300m (30 bar)
- Power reserve
- 55 hours
- Complications
- Date at 6, helium escape valve
- Origin
- Swiss Made
Specifications as published by Omega. We research from manufacturer documentation and published sources rather than hands-on testing. Researched 2026-09-14.
Verdict
Omega’s Seamaster Diver 300M in steel and Sedna gold on the two-tone bracelet, the Master Chronometer 8800 and 300 metres, the least expensive two-tone Seamaster on this page, on Amazon from a marketplace seller well under Omega’s price.
Strengths
- The two-tone Bond Seamaster at the lowest price here
- Sedna gold bezel rim, crown, valve and bracelet links
- 8800 Master Chronometer, 55 hours, 300 metres
- Well under Omega’s own price when read; Amazon’s return window
Trade-offs
- Condition and warranty card not stated by the seller; ask
- About 203 g on the bracelet
- Seller’s row says 11mm; Omega says 13.56mm
- MS-TR JAPAN ships from Japan; ask about delivery time
Buy it if
Someone who wants the gold Seamaster with the best price gap on this page.
Skip it if
You want all steel, yellow gold, or a stated condition.
FAQ
Omega’s co-axial Master Chronometer for the 42mm Seamaster Diver 300M and the smaller Planet Ocean: silicon balance spring, a single barrel for 55 hours, tested by METAS to 15,000 gauss, with a date.
Compare
OmegaSeamaster Diver 300M 42mm 210.20.42.20.01.001 (steel and Sedna gold, black ceramic bezel, black dial, two-tone bracelet) vs Seamaster Diver 300M 42mm 210.20.42.20.01.002 (steel and yellow gold, black ceramic bezel, black dial, two-tone bracelet)
OmegaSeamaster Diver 300M 42mm 210.20.42.20.01.001 (steel and Sedna gold, black ceramic bezel, black dial, two-tone bracelet) vs Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.30.42.20.01.001 (steel, black ceramic dial, steel bracelet)
OmegaSeamaster Diver 300M 42mm 210.20.42.20.01.001 (steel and Sedna gold, black ceramic bezel, black dial, two-tone bracelet) vs Seamaster Diver 300M Co-Axial Master Chronometer 42mm 210.22.42.20.03.001 (steel and yellow gold, blue ceramic dial, blue rubber strap)Sources
- Omega Seamaster Diver 300M 210.20.42.20.01.001, official page
- Amazon marketplace listing (MS-TR JAPAN), read 2026-09-14
Researched and last updated 2026-09-14. We do not test watches in hand; every figure above is traceable to the manufacturer or the sources listed here.
Omega Seamaster Diver 300M 42mm 210.20.42.20.01.001 (steel and Sedna gold, black ceramic bezel, black dial, two-tone bracelet)
Reference 210.20.42.20.01.001 · $10,000–$25,000
Prices and availability change; the band above is a research figure, so check the current listing.
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