Sangin Instruments Atlas IIIvsSeiko Prospex Sea 1968 Heritage Diver's GMT

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.

Sangin Instruments Atlas III at true scale

Atlas III

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

Prospex Sea 1968 Heritage Diver's GMT

Diameter

42mm

42mm

Lug-to-Lug

n/a

48.6mm

Thickness

n/a

12.9mm

Water Resistance

200m

200m

Power Reserve

n/a

72h

MSRP

$949

lowest

$1,500

Movement

La Joux-Perret G100

Seiko 6R54

Case

4 specs
Thickness
n/a
12.9mm
Lug-to-Lug
n/a
48.6mm
Lug Width
n/a
20mm
Material
n/a
Stainless Steel

Crystal & Dial

4 specs
Crystal
n/a
Sapphire
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Black
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
La Joux-Perret G100
Seiko 6R54
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$949
$1,500
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.

Sangin Instruments Atlas III

Owners widely praise the Sangin Instruments Atlas III for its great quality and value, with one owner noting it is hundreds of dollars cheaper than alternatives. The watch is reported to be in excellent condition with minor rub marks visible only up close and is keeping very good time. Some owners find the omission of minute indices bothersome, and one owner prefers a different model due to its smaller case size and lug geometry. Overall, owners rate the Sangin Instruments Atlas III highly for its excellent quality and value from a lesser-known company.

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.

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.