Side by side

Spinnaker Bradner GMTvsSeiko Prospex Sea

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

Bradner GMT
SpinnakerBradner GMT
MSRP $299
Prospex Sea
SeikoProspex Sea
MSRP $595

At a glance

14 of 29 specs differ
Diameter
Bradner GMT42mm
Prospex Sea41.7mm
Power Reserve
Bradner GMT40h
Prospex Sea41h
Water Resistance
Bradner GMT180m
Prospex Sea200m
MSRP
Bradner GMT$299
Prospex Sea$595

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
42mm
41.7mm
Thickness
15mm
12.3mm
Lug-to-Lug
50mm
49.5mm
Lug Width
22mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
180m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Brown
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH34A
4R35
Power Reserve
40h
41h
Jewels
25
23

Pricing

1 specs
MSRP
$299
$595

Follow this matchup

Get a note when Spinnaker Bradner GMT vs Seiko Prospex Sea gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

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

Spinnaker Bradner GMT

The Spinnaker Bradner GMT is praised for its awesome lume and comfortable wearability, with one owner noting the rubber strap is very comfortable and the beads of rice bracelet fits well on smaller wrists. Some find its 15mm thickness and bold colorway may not appeal to everyone, and one owner views it as more of a casual GMT with tool-watch styling than a diver. Overall, owners rate the Spinnaker Bradner GMT highly for its value and comfortable wearability.

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.

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.

Adjacent matchups

People also compared

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