Big Idea Design Ti GMTvsSeiko 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.

Big Idea Design Ti GMT at true scale

Ti GMT

Seiko Prospex Sea 1965 Heritage Diver's Watch at true scale

Prospex Sea 1965 Heritage Diver's Watch

Diameter

40.5mm

40mm

Lug-to-Lug

n/a

46.4mm

Thickness

n/a

13mm

Water Resistance

200m

300m

highest

Power Reserve

n/a

72h

MSRP

$975

lowest

$1,300

Movement

Miyota 9075

Seiko 6R55

Case

6 specs
Diameter
40.5mm
40mm
Thickness
n/a
13mm
Lug-to-Lug
n/a
46.4mm
Lug Width
n/a
20mm
Material
n/a
Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
Miyota 9075
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$975
$1,300
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Reviews

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

Big Idea Design Ti GMT

Owners widely praise the Big Idea Design Ti GMT Watch for its minimal dial, matte case finish, and sapphire crystal, with the Horween leather strap contributing to an authentic and dreamy aesthetic. One owner notes the hour hand can obscure markers, though the brand's reputation is appreciated. On balance, owners rate the Big Idea Design Ti GMT Watch highly for its cool aesthetic and value.

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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