Aigi Watches GRUVEBUSvsSeiko Prospex Sea 1965 Heritage Diver's Watch

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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 1965 Heritage Diver's Watch at true scale

Prospex Sea 1965 Heritage Diver's Watch

Diameter

40mm

40mm

Lug-to-Lug

n/a

46.4mm

Thickness

12.3mm

lowest

13mm

Water Resistance

200m

300m

highest

Power Reserve

n/a

72h

MSRP

$1,095

lowest

$1,300

Movement

Sellita SW200-1

Seiko 6R55

Case

3 specs
Thickness
12.3mm
13mm
Lug-to-Lug
n/a
46.4mm
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
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 6R55
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$1,095
$1,300
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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 1965 Heritage Diver's Watch

Owners widely praise the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined engineering, comfortable 40mm case, and improved 300m water resistance. The watch is noted for its better build quality and finishing compared to some alternatives, featuring a mix of polished and brushed surfaces, with specific callouts for the jewel-toned teal dial with a rippling-water pattern. Some owners consider the price fair, while others suggest it is too high. Accuracy figures vary, with some owners reporting their 6R55 movement performs well within +/- 10 seconds per day, while others note theirs runs slow or have concerns about QC for the price. The bracelet, while improved, lacks modern features like quick-release or extensive micro-adjustments. Overall, owners and reviewers rate the Seiko Prospex Sea 1965 Heritage Diver's Watch highly for its refined design and build quality at its price point.

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