Side by side

Seestern Sub 300 V4vsGrand Seiko SBGR321

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

Sub 300 V4
SeesternSub 300 V4
MSRP $10
SBGR321
Grand SeikoSBGR321
MSRP $5,200

At a glance

16 of 29 specs differ
Diameter
Sub 300 V442mm
SBGR32140mm
Power Reserve
Sub 300 V441h
SBGR32172h
Water Resistance
Sub 300 V4200m
SBGR321100m
MSRP
Sub 300 V4$10
SBGR321$5,200

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
42mm
40mm
Lug-to-Lug
46mm
46.6mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Sandblasted
Brushed and polished
Water Resistance
200m
100m
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
AR Coating
Underside
Yes
Dial Color
Orange
Black
Lume
Japan Lume (blue glow)
None

Movement

5 specs
Caliber
Seiko NH35A
9S65
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
72h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$10
$5,200

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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.

Seestern Sub 300 V4

Owners widely praise the Seestern Sub 300 V4 for its terrific fit and finish and surprising little touches at its $179 price, noting top-notch case, dial, bezel, and crystal. The bracelet is considered nice enough for the price point, and the watch is powered by the solid and reliable Seiko NH35 movement. Some owners report that the polished sides of the case show signs of wear. Overall, owners rate the Seestern Sub 300 V4 highly for its excellent case, dial, and bezel finishing at the price.

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.

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