What movement does the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic run compared to the Grand Seiko STGK003?

Both watches run automatic movements — the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic uses the Sellita SW220-1 and the Grand Seiko STGK003 uses the 9S27.

Side by side

Marathon JDD (Jumbo Day/Date) Anthracite Diver's AutomaticvsGrand Seiko STGK003

Q: Which is cheaper, the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic or the Grand Seiko STGK003?

At MSRP the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic is the cheaper of the two at $3,250, against $31,200 for the Grand Seiko STGK003 — a $27,950 gap before any retailer discounting.

Q: Which is bigger, the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic or the Grand Seiko STGK003?

The Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic wears larger at 46mm versus 28.7mm for the Grand Seiko STGK003 — a 17.3mm difference across the dial.

Q: Which has better water resistance, the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic or the Grand Seiko STGK003?

The Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic is rated to 300m versus 100m for the Grand Seiko STGK003.

Q: Which has a longer power reserve, the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic or the Grand Seiko STGK003?

The Grand Seiko STGK003 carries a 50-hour power reserve against 40 hours on the Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic.

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

Marathon JDD (Jumbo Day/Date) Anthracite Diver's Automatic

46mm-anthracite-large-divers-automatic-jdd

MSRP $3,250

Grand Seiko STGK003

stgk003j

MSRP $31,200

At a glance

12 of 29 specs differ

Diameter

JDD (Jumbo Day/Date) Anthracite Diver's Automatic46mm

STGK00328.7mm

Power Reserve

JDD (Jumbo Day/Date) Anthracite Diver's Automatic40h

STGK00350h

Water Resistance

JDD (Jumbo Day/Date) Anthracite Diver's Automatic300m

STGK003100m

MSRP

JDD (Jumbo Day/Date) Anthracite Diver's Automatic$3,250

STGK003$31,200

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Dial Color

Anthracite

Black

Movement

2 specs

Caliber

Sellita SW220-1

9S27

Power Reserve

40h

50h

Pricing

1 specs

MSRP

$3,250

$31,200

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