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オメガ 210.30.42.20.03.001

Omega

Omega Seamaster Diver 300M (blue) 210.30.42.20.03.001

What Japanese dealers are asking for a pre-owned Omega Seamaster Diver 300M (blue) 210.30.42.20.03.001, a model from 2018, and how to buy one in Japan.

Typical asking price in Japan

¥780,000 ≈ US$4,930

Range ¥663,600–¥902,246 from 20 dealer listings, including Japan's 10% consumption tax. Checked 2026-11-02.

Blue dial, steel bracelet; the most widely listed current Seamaster in Japan.

What it costs to bring home · Example listing 1 · Example listing 2

When was yours made?

Japanese listings often give the serial number or the year. Our Omega date finder turns it into a production date.

Reading a Japanese listing for this watch

スピマス supimasu
Speedmaster.
シーマス shīmasu
Seamaster.
コンステ konsute
Constellation.
パイパンダイヤル paipan daiyaru
Pie-pan dial, with a faceted edge, seen on vintage Constellations.
Cal. / キャリバー kyaribā
Calibre (movement), e.g. Cal.321 or Cal.861 in a Speedmaster.
保証書 / ギャラ hoshōsho / gyara
Warranty card or papers. ギャラ comes from 'guarantee'.
箱・保証書付き (箱保付き) hako hoshōsho tsuki
Comes with the box and papers.
国内正規品 kokunai seiki-hin
First sold by an official dealer in Japan.

More in our guide to Japanese listing terms.

Where to look

Licensed shops that list Omega among their specialities:

Related models

Prices are what Japanese dealers ask on their own websites, not auction or buyback prices. Condition, papers and dial variant can move a price a lot. See all models in the Japan price guide.