Side by side

Seestern Sub 300 V4vsSeiko Prospex Sea Save the Ocean Special Edition

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

Sub 300 V4
SeesternSub 300 V4
MSRP $10

At a glance

14 of 29 specs differ
Diameter
Sub 300 V442mm
Prospex Sea Save the Ocean Special Edition45mm
Power Reserve
Sub 300 V441h
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
Sub 300 V4200m
Prospex Sea Save the Ocean Special Edition200m
MSRP
Sub 300 V4$10
Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

7 specs
Diameter
42mm
45mm
Thickness
13mm
13.2mm
Lug-to-Lug
46mm
47.7mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed + Sandblasted
Brushed and polished
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Orange
Black
Lume
Japan Lume (blue glow)
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35A
4R36
Beat Rate
21,600 vph
28,800 vph
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$10
$625

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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.

Seiko Prospex Sea Save the Ocean Special Edition

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its attractive, unique, and textured dials, often described as having a "Grand Seiko feel" at a more accessible price point, with specific mentions of wave patterns, lagoon hues, and manta ray motifs. Owners appreciate the smooth bezel operation and satisfactory lume. Accuracy figures vary, with one owner reporting +5 seconds per day, while another notes a range from +1/+2 to about -6 seconds per day. The 6R35 movement offers a 70-hour power reserve, and some models feature sapphire crystals. Criticisms include a desire for exhibition casebacks and concerns about the quality and security of the stamped metal clasps and bracelets, which are frequently described as rattly or underwhelming, though this is noted as a common Seiko trait. Some owners are split on the number of Save the Ocean variations and dislike the cyclops magnifier.

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