AETHELSOHN Horizon Shadow GMT Automatic WatchvsSeiko 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.

AETHELSOHN Horizon Shadow GMT Automatic Watch at true scale

Horizon Shadow GMT Automatic Watch

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

Prospex Sea 1965 Heritage Diver's Watch

Diameter

38mm

40mm

Lug-to-Lug

45.5mm

lowest

46.4mm

Thickness

13.3mm

13mm

lowest

Water Resistance

200m

300m

highest

Power Reserve

n/a

72h

MSRP

$255

lowest

$1,300

Movement

Seiko NH34

Seiko 6R55

Case

5 specs
Diameter
38mm
40mm
Thickness
13.3mm
13mm
Lug-to-Lug
45.5mm
46.4mm
Lug Width
18mm
20mm
Water Resistance
200m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
Seiko NH34
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$255
$1,300
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Reviews

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

AETHELSOHN Horizon Shadow GMT Automatic Watch

Owners praise the AETHELSOHN Horizon Shadow GMT Automatic Watch for its value at $109, finding it lovely overall. The bracelet is considered mediocre and the lume is poor. The watch features a Seiko NH34 automatic movement and 200m water resistance in a 38mm case. On balance, owners rate the AETHELSOHN Horizon Shadow GMT Automatic Watch well for its affordability and overall aesthetic appeal despite minor criticisms of the bracelet and lume.

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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