Side by side

Seestern Sub 300 V4vsGrand Seiko SBGM221

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

Sub 300 V4
SeesternSub 300 V4
MSRP $10
SBGM221
Grand SeikoSBGM221
MSRP $5,400

At a glance

18 of 29 specs differ
Diameter
Sub 300 V442mm
SBGM22139.5mm
Power Reserve
Sub 300 V441h
SBGM22172h
Water Resistance
Sub 300 V4200m
SBGM22130m
MSRP
Sub 300 V4$10
SBGM221$5,400

Full specifications

Case

9 specs
Category
Diver
GMT
Diameter
42mm
39.5mm
Thickness
13mm
13.7mm
Lug-to-Lug
46mm
46.9mm
Lug Width
20mm
19mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Sandblasted
Brushed and polished
Water Resistance
200m
30m
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
9S66
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
72h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$10
$5,400

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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 SBGM221

Grand Seiko SBGM221 is widely praised for its exceptional dial finish, highly polished hands and indices, and elegant design. Owners consistently highlight the stunning craftsmanship, with specific mention of the up to 11 hand-polished facets on its rectangular markers. The reliable 9S66 movement is noted for its 72-hour power reserve and true GMT functionality, tested beyond Chronometer specifications. Some enthusiasts desire a bidirectional 24-hour bezel, which the Grand Seiko SBGM221 lacks, and its 13.7mm thickness and 19mm lug width are noted as potential limitations. On balance, owners rate the Grand Seiko SBGM221 highly for its exquisite finishing and elegant, comfortable design.

From video reviewers

The SBGM221 is praised for its value within the Grand Seiko lineup. The lug width is cited as a weakness.

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