Side by side

Grand Seiko SBGR321vsSugess Seestern Heritage S436-2 BB GMT

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

SBGR321
Grand SeikoSBGR321
MSRP $5,200
Seestern Heritage S436-2 BB GMT
SugessSeestern Heritage S436-2 BB GMT
MSRP $299

At a glance

11 of 29 specs differ
Diameter
SBGR32140mm
Seestern Heritage S436-2 BB GMT40mm
Power Reserve
SBGR32172h
Seestern Heritage S436-2 BB GMT35h
Water Resistance
SBGR321100m
Seestern Heritage S436-2 BB GMT10m
MSRP
SBGR321$5,200
Seestern Heritage S436-2 BB GMT$299

Full specifications

Case

4 specs
Category
Dress
GMT
Thickness
13mm
12.2mm
Lug-to-Lug
46.6mm
48mm
Water Resistance
100m
10m

Crystal & Dial

2 specs
AR Coating
Yes
Inner
Lume
None
Tritium

Movement

4 specs
Caliber
9S65
Seiko NH34
Beat Rate
28,800 vph
3 vph
Power Reserve
72h
35h
Complications
None
GMT, Moonphase, Date

Pricing

1 specs
MSRP
$5,200
$299

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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 SBGR321

Grand Seiko SBGR321 owners and reviewers widely praise its attractive design, compelling dimensions, and robust movement. The watch features sharp case lines with contrasting brushing and polishing, a 40mm steel case that provides presence without bulk, and 100m water resistance. Its sunburst blue dial, inspired by the dawn sky over Mount Iwate, showcases Grand Seiko's signature finishing on applied markers and hands, with a red-tipped seconds hand. The 9S65 automatic movement is noted for its precision, running within specifications, with one source reporting a +5 to -3 seconds a day rate and a 3-day power reserve. A blue rotor with a crimson rim, also inspired by Mount Iwate, is visible through the display caseback. On balance, owners and reviewers rate the Grand Seiko SBGR321 highly for its exceptional finishing and compelling blue dial design at its price point.

Sugess Seestern Heritage S436-2 BB GMT

Owners widely praise the Sugess Seestern Heritage S436-2 BB GMT for its 39mm sizing, 12mm thinness, and light yet solid feel, with many appreciating its legibility due to the matte dial, clear crystal, and strong lume, though one owner flags the lume as a weak point. The case finishing is considered excellent, and the blue dial and satin finish are favorably compared to alternatives. Some owners report issues with a loose bezel, with others finding it improved after tuning, and one owner notes the seconds hand is too short. The bracelet clasp lacks sufficient micro-adjustment and screw pins are difficult to remove. On balance, owners rate the Sugess Seestern Heritage S436-2 BB GMT highly for its comfortable wearability and attractive finishing at the price.

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