Which is cheaper, the Grand Seiko SBGX363 or the Spinnaker Bradner GMT?

At MSRP the Spinnaker Bradner GMT is the cheaper of the two at $299, against $3,600 for the Grand Seiko SBGX363 — a $3,301 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGX363 or the Spinnaker Bradner GMT?

The Spinnaker Bradner GMT wears larger at 42mm versus 32.3mm for the Grand Seiko SBGX363 — a 9.7mm difference across the dial.

Which has better water resistance, the Grand Seiko SBGX363 or the Spinnaker Bradner GMT?

The Spinnaker Bradner GMT is rated to 180m versus 100m for the Grand Seiko SBGX363.

What movement does the Grand Seiko SBGX363 run compared to the Spinnaker Bradner GMT?

The Grand Seiko SBGX363 runs a quartz caliber (9F51), while the Spinnaker Bradner GMT runs a automatic (Seiko NH34A).

Side by side

Grand Seiko SBGX363vsSpinnaker Bradner GMT

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

Grand Seiko SBGX363

sbgx363g

MSRP $3,600

Spinnaker Bradner GMT

bradner-gmt-automatic-abbott-brown-sp-5121-22

MSRP $299

At a glance

12 of 29 specs differ

Diameter

SBGX36332.3mm

Bradner GMT42mm

Power Reserve

SBGX36340h

Bradner GMT40h

Water Resistance

SBGX363100m

Bradner GMT180m

MSRP

SBGX363$3,600

Bradner GMT$299

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Black

Brown

Movement

2 specs

Caliber

9F51

Seiko NH34A

Type

Quartz

Automatic

Pricing

1 specs

MSRP

$3,600

$299

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Grand Seiko SBGX363vsSpinnaker Bradner GMT

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