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

Seiko Prospex Sea owners and reviewers praise its Marinemaster-style aesthetic, excellent case finishing, and impressive LumiBrite lume. The watch is powered by the 6R15 movement with a 50-hour power reserve and comes with both a steel bracelet and a silicone strap. Some owners find the Seiko Prospex Sea to be a great value and a suitable first "proper" watch, while others report it is uncomfortably big, thick, and heavy on smaller wrists. Reviewers note the GMT function is secondary with a less prominent scale, and the bezel's quieter clicks may not appeal to all. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and finishing at its price point.

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 Sea43.5mm
SUB 300T42.5mm
Power Reserve
Prospex Sea70h
SUB 300T
Water Resistance
Prospex Sea200m
SUB 300T1,200m
MSRP
Prospex Sea$1,500
SUB 300T$2,190

Full specifications

Case

6 specs
Diameter
43.5mm
42.5mm
Thickness
13.3mm
0mm
Lug-to-Lug
51mm
0mm
Lug Width
22mm
0mm
Material
Titanium
Stainless Steel
Water Resistance
200m
1200m

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Yes
Dial Color
Aquamarine
Lume
LumiBrite on hands and index(es)
Super-LumiNova

Movement

4 specs
Caliber
Seiko 6R35
Type
Automatic
Power Reserve
70h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$1,500
$2,190
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