Audaz Reef DivervsSeiko 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.

Audaz Reef Diver at true scale

Reef Diver

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

Prospex Sea 1968 Heritage Diver's GMT

Diameter

45mm

42mm

Lug-to-Lug

53mm

48.6mm

lowest

Thickness

15.5mm

12.9mm

lowest

Water Resistance

300m

highest

200m

Power Reserve

n/a

72h

MSRP

$420

lowest

$1,500

Movement

Seiko NH35

Seiko 6R54

Case

5 specs
Diameter
45mm
42mm
Thickness
15.5mm
12.9mm
Lug-to-Lug
53mm
48.6mm
Lug Width
24mm
20mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Camouflage
n/a
Lume
SuperLuminova
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
Seiko 6R54
Power Reserve
n/a
72h
Jewels
0
24

Pricing

1 specs
MSRP
$420
$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.

Audaz Reef Diver

The Audaz Reef Diver is a bold, rugged tool watch with a focus on clarity and accuracy for diving. It features a 45mm 316L stainless steel case, sapphire crystal, Super-LumiNova C3, and 300m water resistance. One owner notes it is a large, heavy watch. The Audaz Reef Diver is available with a Seiko NH35 automatic movement starting at $269. On balance, owners and reviewers view the Audaz Reef Diver positively for its dependable tool-watch design and robust specifications at its price point.

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.