Seiko Prospex Sea 1968 Heritage Diver's GMTvsSpinnaker Bradner Automatic

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Seiko Prospex Sea 1968 Heritage Diver's GMT at true scale

Prospex Sea 1968 Heritage Diver's GMT

Spinnaker Bradner Automatic at true scale

Bradner Automatic

Diameter

42mm

42mm

Lug-to-Lug

48.6mm

lowest

50mm

Thickness

12.9mm

lowest

15mm

Water Resistance

200m

highest

180m

Power Reserve

72h

n/a

MSRP

$1,500

$179

lowest

Movement

Seiko 6R54

Miyota 8215

Case

5 specs
Thickness
12.9mm
15mm
Lug-to-Lug
48.6mm
50mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
180m

Crystal & Dial

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

Movement

3 specs
Caliber
Seiko 6R54
Miyota 8215
Power Reserve
72h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$1,500
$179
Keep your wishlist and collection together in the appExplore the app

Reviews

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

Seiko Prospex Sea 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and value, with owners noting its comfortable wearability and attractive aesthetic, particularly the silver/white sunray dial and blue ceramic bezel. The improved bracelet clasp with excellent micro-adjustment is a recurring positive point. Some owners report accuracy figures of +3 seconds per day or +/- 5 seconds per day, exceeding the movement's stated range. However, the GMT functionality is considered secondary to its dive watch capabilities by some, with the GMT scale being difficult to read and the caller-style GMT movement being a drawback for certain users. The dial contrast is also noted as lacking by some, and the crown at 4 o'clock is undesirable for a few. On balance, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT highly for its blend of dive watch character and GMT functionality, offering significant features for its price.

Spinnaker Bradner Automatic

Owners widely praise the Spinnaker Bradner's vibrant dial options and excellent lume on both indices and bezel, with one reviewer calling the textured dial's fine details and color-matched bezel lume a work of art. The bezel action is described as extremely crisp. However, some finishing on the minute ring is imprecise, and the inner bezel crown rotates too easily, with one owner finding the clasp unsatisfactory. The watch uses a Seiko NH35 automatic movement and is 42mm in case size with 180m water resistance. On balance, owners rate the Spinnaker Bradner highly for its eye-catching design and lume at its price point.

From video reviewers

The Spinnaker Atlantic Blue's reliable Seiko NH35 automatic movement is a key strength. The watch's lume performance is somewhat lacking, which may be a trade-off for some buyers. Reviewers disagree on the watch's bezel action, with one reviewer praising it as smooth and precise, while the other two do not mention it.

Similar watches

Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.

DiscussionNot started

Also compared

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