Side by side

Grand Seiko SBGN027vsZelos Hammerhead V3 300m Titanium

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

SBGN027
Grand SeikoSBGN027
MSRP $3,700
Hammerhead V3 300m Titanium
ZelosHammerhead V3 300m Titanium
MSRP $559

At a glance

13 of 29 specs differ
Diameter
SBGN02739mm
Hammerhead V3 300m Titanium44mm
Power Reserve
SBGN02740h
Hammerhead V3 300m Titanium40h
Water Resistance
SBGN027200m
Hammerhead V3 300m Titanium300m
MSRP
SBGN027$3,700
Hammerhead V3 300m Titanium$559

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
39mm
44mm
Thickness
12.3mm
13mm
Lug-to-Lug
45.9mm
44mm
Lug Width
19mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
200m
300m

Crystal & Dial

3 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Black
Ti - Mosaic MOP

Movement

2 specs
Caliber
9F86
Seiko NH35
Type
Quartz
Automatic

Pricing

1 specs
MSRP
$3,700
$559

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Grand Seiko SBGN027

Owners widely praise the Grand Seiko SBGN027 for its exceptional Zaratsu polishing, compact 39mm size, and versatile monochrome aesthetic, noting its thin profile and suitability as a grab-and-go watch. The 9F quartz movement delivers highly accurate timekeeping, with one owner reporting +/- 10 seconds per year. However, some find the lume limited, the bracelet lacks micro-adjustments, and the GMT hand can be easily mistaken for the minute hand. One owner reported a black index on the bezel disappearing after a couple of months. On balance, owners rate the Grand Seiko SBGN027 highly for its premium finishing and accurate HAQ GMT movement in a wearable size.

Zelos Hammerhead V3 300m Titanium

The Zelos Hammerhead V3 300m Titanium is widely praised for its exceptional lume, unique and beautiful dial finishing that reflects light dramatically, and solid build quality that exceeds its price point. Owners also highlight its comfortable wearability, especially the lightweight titanium variant, and the convenient on-the-fly micro-adjustment on the bracelet. One owner notes the Japanese movement performs better than anticipated, and the Ti-Damascus variant features a unique, patterned dial and bezel. However, some owners find the 44mm size large, the crown "off," and the bracelet clasp could be more scratch-resistant, with resizing pins described as stubborn. Reattaching the bracelet after removal is also noted as extremely difficult. Overall, owners rate the Zelos Hammerhead V3 300m Titanium highly for its impressive dial aesthetics and value for money.

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