Boderry Seaturtle.Ocean DivervsSeiko Prospex Marinemaster 1965 Heritage Diver's Watch

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Boderry Seaturtle.Ocean Diver at true scale

Seaturtle.Ocean Diver

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

Prospex Marinemaster 1965 Heritage Diver's Watch

Diameter

40mm

39.5mm

Lug-to-Lug

n/a

47.2mm

Thickness

12.5mm

12.3mm

lowest

Water Resistance

100m

200m

highest

Power Reserve

n/a

45h

MSRP

$249

lowest

$2,800

Movement

Seiko NH35

Seiko 6L37

Case

5 specs
Diameter
40mm
39.5mm
Thickness
12.5mm
12.3mm
Lug-to-Lug
n/a
47.2mm
Lug Width
n/a
20mm
Water Resistance
100m
200m

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 NH35
Seiko 6L37
Power Reserve
0h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$249
$2,800
Keep your wishlist and collection together in the appExplore the app

Reviews

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

Boderry Seaturtle.Ocean Diver

Owners widely praise the Boderry SEATURTLE.OCEAN - Automatic Diver Watch (NH35 movement) for its exceptional value, citing its original design, sapphire crystal, and thin 11.7mm profile for an NH35 movement. One owner reports an accuracy of -1 second per day, while another notes the titanium case and 100m water resistance are well-executed. Some owners report issues with the NH35 movement stopping, though others have had no problems with the brand. A rattling sound, noted by some owners, is considered normal for the NH35 movement and is deemed acceptable given the low price point. Overall, owners rate the Boderry SEATURTLE.OCEAN - Automatic Diver Watch (NH35 movement) highly for its impressive feature set and design at its price point.

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.