Side by side

Lum-Tec Combat B71vsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch

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 1968 Heritage Diver's GMT Watch

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch offers a 300-meter depth rating and a caller-style GMT complication powered by the Caliber 6R54 movement, which provides a 72-hour power reserve. Reviewers note its refined clasp with extensive micro-adjustment. However, the movement's accuracy, ranging from +25 to -15 seconds per day, is considered a drawback by some. Overall, reviewers highlight the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch as a good reminder of Seiko's value, despite the wide accuracy range of its movement.

At a glance

13 of 29 specs differ
Diameter
Combat B7143mm
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Power Reserve
Combat B71
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Water Resistance
Combat B71200m
Prospex Sea 1968 Heritage Diver's GMT Watch300m
MSRP
Combat B71$595
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700

Full specifications

Case

6 specs
Category
Diver
Diameter
43mm
42mm
Thickness
13.6mm
13.3mm
Lug-to-Lug
51.5mm
48.6mm
Lug Width
22mm
20mm
Water Resistance
200m
300m

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
6R54
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$595
$1,700
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