Raven Custom - 39mm GMT DivervsSeiko Prospex Marinemaster Marinemaster 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.

Raven Custom - 39mm GMT Diver at true scale

Custom - 39mm GMT Diver

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

Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

Diameter

39mm

39.5mm

Lug-to-Lug

n/a

47.2mm

Thickness

n/a

12.3mm

Water Resistance

200m

200m

Power Reserve

n/a

45h

MSRP

$590

lowest

$2,800

Movement

Seiko NH34

Seiko 6L37

Case

4 specs
Diameter
39mm
39.5mm
Thickness
n/a
12.3mm
Lug-to-Lug
n/a
47.2mm
Material
Ceramic
Stainless Steel

Crystal & Dial

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

Movement

3 specs
Caliber
Seiko NH34
Seiko 6L37
Power Reserve
0h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$590
$2,800
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Reviews

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

Raven Custom - 39mm GMT Diver

Owners praise the Raven Custom - 39mm GMT Diver for its 39mm case size, legibility, and bezel action. One owner notes the watch runs flawlessly. The Raven Custom - 39mm GMT Diver is offered new in box for $375, featuring a Seiko NH34 GMT movement and BGW9 lume. Some owners find the included bracelet too simple for the case finish and opt for alternatives. Overall, owners rate the Raven Custom - 39mm GMT Diver highly for its wearability and value.

Seiko Prospex Marinemaster 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.