Seiko Prospex Marinemaster 1965 Heritage Diver's WatchvsZelos Spearfish 3

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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.

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

Prospex Marinemaster 1965 Heritage Diver's Watch

Zelos Spearfish 3 at true scale

Spearfish 3

Diameter

39.5mm

40mm

Lug-to-Lug

47.2mm

n/a

Thickness

12.3mm

11.5mm

lowest

Water Resistance

200m

200m

Power Reserve

45h

n/a

MSRP

$2,800

$799

lowest

Movement

Seiko 6L37

La Joux-Perret G100

Case

4 specs
Diameter
39.5mm
40mm
Thickness
12.3mm
11.5mm
Lug-to-Lug
47.2mm
n/a
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

4 specs
Crystal Shape
Box
n/a
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
Diver - Forged Carbon
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 6L37
La Joux-Perret G100
Power Reserve
45h
0h
Jewels
26
0

Pricing

1 specs
MSRP
$2,800
$799
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Reviews

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

Seiko Prospex Marinemaster 1965 Heritage Diver's Watch

The Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch is praised for its modern execution of a classic design, with reviewers noting the appealing 39.5mm case size and updated bracelet that improve wearability. Some reviewers mention the 6L37 movement has a 46-hour power reserve, with accuracy rated around -10/+15 seconds per day. A drawback identified by reviewers is the lack of tool-free micro-adjustment on the clasp. Overall, owners and reviewers find the Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch to be a handsome re-interpretation of a beloved design, with its improved wearability being a key strength.

Zelos Spearfish 3

Owners widely praise the Zelos Spearfish 3 for its exceptional finishing, with razor-sharp transitions and polish that exceed expectations for its price point. The 40mm case is noted for its wearability, and the bracelet is considered superb, featuring a tool-less micro-adjustment clasp that is among the best from microbrands. Some owners also highlight the beautiful and unique dials as a significant draw. One owner found the titanium case too light, though later regretted selling it. The Zelos Spearfish 3 uses the La Joux-Perret G100 automatic movement. Overall, owners and reviewers rate the Zelos Spearfish 3 highly for its outstanding finishing and wearability at its price point.

From video reviewers

The La Joux Perret G100 movement is a significant strength. The bracelet's refinement is a weakness. Reviewers disagreed on the dial material, with one noting a burnt orange sunburst and another mentioning meteorite.

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