Side by side

Lum-Tec Combat B71vsSeiko Prospex Sea

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

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.

At a glance

12 of 29 specs differ
Diameter
Combat B7143mm
Prospex Sea43.5mm
Power Reserve
Combat B71
Prospex Sea70h
Water Resistance
Combat B71200m
Prospex Sea200m
MSRP
Combat B71$595
Prospex Sea$1,500

Full specifications

Case

5 specs
Category
Diver
Diameter
43mm
43.5mm
Thickness
13.6mm
13.3mm
Lug-to-Lug
51.5mm
51mm
Material
Stainless Steel
Titanium

Crystal & Dial

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

Movement

3 specs
Caliber
Ronda 515
Seiko 6R35
Power Reserve
0h
70h
Jewels
0
24

Pricing

1 specs
MSRP
$595
$1,500
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