Seiko 5 “Blue Hour” — 6309 Sunburst Cushion Automatic Watch.

Seiko 5 “Blue Hour” — 6309 Sunburst Cushion Automatic Watch.

Some dials you read. This one you fall into.

Tilt it toward the light and the blue moves — a deep midnight at the edges melting into cobalt at the center, the sunburst finish throwing the whole face into slow motion as your wrist turns. Twelve faceted crystal markers sit around the perimeter like stars pinned to dusk, catching light the moment the dial goes quiet. This is 1970s Seiko at its most unapologetically dressed — the cushion case, the polished bezel ring, the tonneau silhouette that modern watches spent decades forgetting how to make.

Inside beats the Seiko 6309 — one of the most trusted automatic movements Japan ever built. Self-winding. Day-date at 3. The kind of engine that outlives trends, outlives owners, and keeps ticking through it all. This one has been fully opened, serviced, and put across the timegrapher until the numbers held.

Not a reissue. Not a tribute. The actual thing, from the era that made it.

The Details

◦ Movement — Seiko 6309 automatic, self-winding

◦ Reference — 6309-5170 (caseback) / 6309-5200 dial

◦ Serial — 401448

◦ Case — 36 × 40mm stainless steel, cushion form

◦ Dial — Blue sunburst, jewelled crystal hour markers

◦ Function — Day / Date, English calendar

◦ Origin — Made in Japan

◦ Power reserve — 20hr+ on a full wind

◦ Strap — Black leather, 20mm

Why buy from Bengal Curator

✅ Only 1 in existence in this store — sold once, gone forever

✅ Fully serviced & timegrapher-verified before listing

✅ 6-month warranty

✅ Easy returns on arrival — inspect before you commit

✅ Free tracked & insured shipping, nationwide

✅ Arrives in a premium leather presentation box

Vintage means one. When this leaves the tray, the search starts over for whoever comes next. If the blue already has you, don’t wait for the second look — there won’t be a second one.

৳9,000 — today.

Curated, serviced, and stood behind — by Bengal Curator.