Which is cheaper, the Grand Seiko SBGA384 or the Spinnaker Dumas Automatic?

At MSRP the Spinnaker Dumas Automatic is the cheaper of the two at $239, against $29,500 for the Grand Seiko SBGA384 — a $29,261 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGA384 or the Spinnaker Dumas Automatic?

The Spinnaker Dumas Automatic wears larger at 44mm versus 40mm for the Grand Seiko SBGA384 — a 4mm difference across the dial.

Which has better water resistance, the Grand Seiko SBGA384 or the Spinnaker Dumas Automatic?

The Spinnaker Dumas Automatic is rated to 300m versus 100m for the Grand Seiko SBGA384.

Which has a longer power reserve, the Grand Seiko SBGA384 or the Spinnaker Dumas Automatic?

The Grand Seiko SBGA384 carries a 72-hour power reserve against 40 hours on the Spinnaker Dumas Automatic.

What movement does the Grand Seiko SBGA384 run compared to the Spinnaker Dumas Automatic?

The Grand Seiko SBGA384 runs a spring drive caliber (9R15), while the Spinnaker Dumas Automatic runs a automatic (SII NH35A).

Side by side

Grand Seiko SBGA384vsSpinnaker Dumas Automatic

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

Grand Seiko SBGA384

sbga384g

MSRP $29,500

Spinnaker Dumas Automatic

dumas-blue-yonder-sp-5081-dd

MSRP $239

At a glance

13 of 29 specs differ

Diameter

SBGA38440mm

Dumas Automatic44mm

Power Reserve

SBGA38472h

Dumas Automatic40h

Water Resistance

SBGA384100m

Dumas Automatic300m

MSRP

SBGA384$29,500

Dumas Automatic$239

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Black

Blue

Movement

3 specs

Caliber

9R15

SII NH35A

Type

Spring Drive

Automatic

Power Reserve

72h

40h

Pricing

1 specs

MSRP

$29,500

$239

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Grand Seiko SBGA384vsSpinnaker Dumas Automatic

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Full specifications

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