Side by side

Seiko Prospex SeavsDOXA SUB 300T

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

What people say

Owners + reviewers, side by side

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

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its excellent value, robust build, and superior lume, with many noting its comfortable wearability and faithful design recreations. Some owners report the watch can feel big, thick, and heavy on smaller wrists, while others find the sizing perfect. The bezel action is frequently highlighted as smooth and precise, often exceeding that of less expensive models. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its impressive finishing and value proposition.

DOXA SUB 300T

Owners widely praise the DOXA SUB 300T's functional and distinctive design, with reviewers highlighting its historical visibility and robust build. Legibility is consistently noted as excellent, with reviewers appreciating the functional no-decompression bezel and distinct hand shapes. The watch's accuracy is reported as good, with one owner seeing a 3-4 second daily gain, though the 38-hour power reserve is considered underwhelming by some at its price point. Criticisms include a stamped clasp that feels out of place and a bezel that may have lateral movement. The 42.5mm case is described as substantial and heavy, appearing larger due to extra width and making it unsuitable for dress shirts, a trade-off for its 1200-meter water resistance. On balance, owners and reviewers rate the DOXA SUB 300T highly for its unique design and robust dive watch capabilities.

At a glance

14 of 29 specs differ
Diameter
Prospex Sea41.7mm
SUB 300T42.5mm
Power Reserve
Prospex Sea41h
SUB 300T
Water Resistance
Prospex Sea200m
SUB 300T1,200m
MSRP
Prospex Sea$595
SUB 300T$2,190

Full specifications

Case

5 specs
Diameter
41.7mm
42.5mm
Thickness
12.3mm
0mm
Lug-to-Lug
49.5mm
0mm
Lug Width
20mm
0mm
Water Resistance
200m
1200m

Crystal & Dial

4 specs
Crystal
Hardlex
Sapphire
AR Coating
Yes
Dial Color
Aquamarine
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova

Movement

4 specs
Caliber
4R35
Type
Automatic
Power Reserve
41h
0h
Jewels
23
0

Pricing

1 specs
MSRP
$595
$2,190
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Seiko Prospex Sea vs DOXA SUB 300T gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.