Which is cheaper, the Oak & Oscar The Humboldt GMT USSS Edition or the Grand Seiko SLGA015?

At MSRP the Oak & Oscar The Humboldt GMT USSS Edition is the cheaper of the two at $2,200, against $12,600 for the Grand Seiko SLGA015 — a $10,400 gap before any retailer discounting.

Which is bigger, the Oak & Oscar The Humboldt GMT USSS Edition or the Grand Seiko SLGA015?

The Grand Seiko SLGA015 wears larger at 43.8mm versus 39.5mm for the Oak & Oscar The Humboldt GMT USSS Edition — a 4.3mm difference across the dial.

Which has a longer power reserve, the Oak & Oscar The Humboldt GMT USSS Edition or the Grand Seiko SLGA015?

The Grand Seiko SLGA015 carries a 120-hour power reserve against 56 hours hours on the Oak & Oscar The Humboldt GMT USSS Edition.

What movement does the Oak & Oscar The Humboldt GMT USSS Edition run compared to the Grand Seiko SLGA015?

The Oak & Oscar The Humboldt GMT USSS Edition runs a automatic caliber (Sellita SW330), while the Grand Seiko SLGA015 runs a spring drive (9RA5).

Side by side

Oak & Oscar The Humboldt GMT USSS EditionvsGrand Seiko SLGA015

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

Oak & Oscar The Humboldt GMT USSS Edition

HMBDLTGMTUSSS

MSRP $2,200

Grand Seiko SLGA015

slga015g

MSRP $12,600

At a glance

14 of 29 specs differ

Diameter

The Humboldt GMT USSS Edition39.5mm

SLGA01543.8mm

Power Reserve

The Humboldt GMT USSS Edition56 hoursh

SLGA015120h

Water Resistance

The Humboldt GMT USSS Edition200m

SLGA015200m

MSRP

The Humboldt GMT USSS Edition$2,200

SLGA015$12,600

Full specifications

Case

7 specs

Crystal & Dial

3 specs

Crystal Shape

Double-domed

Flat

AR Coating

Inner

Yes

Lume

Super-LumiNova BGW9

None

Movement

3 specs

Caliber

Sellita SW330

9RA5

Type

Automatic

Spring Drive

Power Reserve

56 hoursh

120h

Pricing

1 specs

MSRP

$2,200

$12,600

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