Which is cheaper, the Rolex Day-Date or the Seiko King Seiko KSK?

At MSRP the Seiko King Seiko KSK is the cheaper of the two at $1,900, against $69,000 for the Rolex Day-Date — a $67,100 gap before any retailer discounting.

Which is bigger, the Rolex Day-Date or the Seiko King Seiko KSK?

The Seiko King Seiko KSK wears larger at 36.1mm versus 36mm for the Rolex Day-Date — a 0.1mm difference across the dial.

Which has better water resistance, the Rolex Day-Date or the Seiko King Seiko KSK?

The Rolex Day-Date is rated to 100m versus 10m for the Seiko King Seiko KSK.

Which has a longer power reserve, the Rolex Day-Date or the Seiko King Seiko KSK?

The Seiko King Seiko KSK carries a 72-hour power reserve against 70 hours on the Rolex Day-Date.

What movement does the Rolex Day-Date run compared to the Seiko King Seiko KSK?

Both watches run automatic movements — the Rolex Day-Date uses the 3255 and the Seiko King Seiko KSK uses the 6R51.

Side by side

Rolex Day-DatevsSeiko King Seiko KSK

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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Rolex Day-Date

128345RBR

MSRP $69,000

Seiko King Seiko KSK

spb457j1

MSRP $1,900

At a glance

17 of 29 specs differ

Diameter

Day-Date36mm

King Seiko KSK36.1mm

Power Reserve

Day-Date70h

King Seiko KSK72h

Water Resistance

Day-Date100m

King Seiko KSK100m

MSRP

Day-Date$69,000

King Seiko KSK$1,900

Full specifications

Case

7 specs

Diameter

36mm

36.1mm

Thickness

—

11.6mm

Lug-to-Lug

—

43mm

Lug Width

—

19mm

Material

18kt Everose Gold

Stainless Steel

Finish

18 kt Everose gold

Brushed and polished

Caseback

Monobloc middle case, screw-down case back and winding crown

Solid

Crystal & Dial

5 specs

Crystal Shape

Flat

Box

AR Coating

—

Anti-reflective coating on inner surface

Dial Color

White

Black

Indices

Roman numerals

Applied

Lume

None

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

3255

6R51

Power Reserve

70h

72h

Jewels

Complications

Day-Date

None

Pricing

1 specs

MSRP

$69,000

$1,900

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Rolex Day-DatevsSeiko King Seiko KSK

At a glance

Full specifications

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