Side by side

Lum-Tec Combat B71vsSeiko Prospex Sea Save the Ocean Special Edition

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.

Lum-Tec Combat B71

Owners widely praise the Lum-Tec Combat B7 for its exceptionally bright lume and utilitarian design, with one owner specifically noting the appeal of the Cali dial. Confidence exists in the durability of its DLC coating. Reviewers, however, flag the hands as too short and the date window as less than ideally integrated.

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.

At a glance

11 of 29 specs differ
Diameter
Combat B7143mm
Prospex Sea Save the Ocean Special Edition45mm
Power Reserve
Combat B71
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
Combat B71200m
Prospex Sea Save the Ocean Special Edition200m
MSRP
Combat B71$595
Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

4 specs
Category
Diver
Diameter
43mm
45mm
Thickness
13.6mm
13.2mm
Lug-to-Lug
51.5mm
47.7mm

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Dial Color
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Ronda 515
Seiko 4R36
Power Reserve
0h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$595
$625
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