Which is cheaper, the Grand Seiko SBGX363 or the Spinnaker Dumas Automatic?

At MSRP the Spinnaker Dumas Automatic is the cheaper of the two at $239, against $3,600 for the Grand Seiko SBGX363 — a $3,361 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGX363 or the Spinnaker Dumas Automatic?

The Spinnaker Dumas Automatic wears larger at 44mm versus 32.3mm for the Grand Seiko SBGX363 — a 11.7mm difference across the dial.

Which has better water resistance, the Grand Seiko SBGX363 or the Spinnaker Dumas Automatic?

The Spinnaker Dumas Automatic is rated to 300m versus 100m for the Grand Seiko SBGX363.

What movement does the Grand Seiko SBGX363 run compared to the Spinnaker Dumas Automatic?

The Grand Seiko SBGX363 runs a quartz caliber (9F51), while the Spinnaker Dumas Automatic runs a automatic (SII NH35A).

Side by side

Grand Seiko SBGX363vsSpinnaker Dumas Automatic

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

Grand Seiko SBGX363

sbgx363g

MSRP $3,600

Spinnaker Dumas Automatic

dumas-blue-yonder-sp-5081-dd

MSRP $239

At a glance

12 of 29 specs differ

Diameter

SBGX36332.3mm

Dumas Automatic44mm

Power Reserve

SBGX36340h

Dumas Automatic40h

Water Resistance

SBGX363100m

Dumas Automatic300m

MSRP

SBGX363$3,600

Dumas Automatic$239

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Black

Blue

Movement

2 specs

Caliber

9F51

SII NH35A

Type

Quartz

Automatic

Pricing

1 specs

MSRP

$3,600

$239

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Grand Seiko SBGX363vsSpinnaker Dumas Automatic

At a glance

Full specifications

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