Aigi Watches GRUVEBUSvsSeiko Prospex Sea 1968 Heritage Diver's GMT

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Measurements

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

Aigi Watches GRUVEBUS at true scale

GRUVEBUS

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

Prospex Sea 1968 Heritage Diver's GMT

Diameter

40mm

42mm

Lug-to-Lug

n/a

48.6mm

Thickness

12.3mm

lowest

12.9mm

Water Resistance

200m

200m

Power Reserve

n/a

72h

MSRP

$1,095

lowest

$1,500

Movement

Sellita SW200-1

Seiko 6R54

Case

3 specs
Diameter
40mm
42mm
Thickness
12.3mm
12.9mm
Lug-to-Lug
n/a
48.6mm

Crystal & Dial

3 specs
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
Sellita SW200-1
Seiko 6R54
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,095
$1,500
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Reviews

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

Aigi Watches GRUVEBUS

Owners widely praise the Aigi Watches GRUVEBUS for its legibility and the unique coal-pressed dial motif, with some comparing its character to Grand Seiko. The watch features GTLS tubes for luminescence and a hardened steel 40mm case, powered by a Sellita SW200-1 automatic movement and offering 200m water resistance. Some owners report receiving the watch with a Miyota 9015 movement upgrade. One owner notes the Jubilee-style bracelet as a luxurious touch for a tool watch, while another finds the 40mm case size and 49mm lug-to-lug measurement to be chunky. On balance, owners and reviewers find the Aigi Watches GRUVEBUS to be a decent tool watch for its price, with its unique dial and legibility being key strengths.

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.