Oceaneva GMT Titanium Automatic Deep Marine Explorer 1250MvsSeiko Prospex Sea 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.

Oceaneva GMT Titanium Automatic Deep Marine Explorer 1250M at true scale

GMT Titanium Automatic Deep Marine Explorer 1250M

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

Prospex Sea 1965 Heritage Diver's Watch

Diameter

42mm

40mm

Lug-to-Lug

n/a

46.4mm

Thickness

15.8mm

13mm

lowest

Water Resistance

1250m

highest

300m

Power Reserve

n/a

72h

MSRP

$749

lowest

$1,300

Movement

Seiko NH34

Seiko 6R55

Case

6 specs
Diameter
42mm
40mm
Thickness
15.8mm
13mm
Lug-to-Lug
n/a
46.4mm
Lug Width
22mm
20mm
Material
Titanium
Stainless Steel
Water Resistance
1250m
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
$749
$1,300
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.

Oceaneva GMT Titanium Automatic Deep Marine Explorer 1250M

Owners widely praise the Oceaneva GMT Titanium Automatic Deep Marine Explorer 1250M for its exceptional value, robust titanium construction, and impressive 1250m water resistance, with one owner noting it has been fantastic for years. The watch features an uncommon mother-of-pearl dial option and BGW9 lume, powered by the reliable Seiko NH34 automatic GMT movement. It has been observed as a blend of design elements from established luxury dive and GMT watches, with a price point around $225-$299 depending on discounts. Overall, owners and reviewers rate the Oceaneva GMT Titanium Automatic Deep Marine Explorer 1250M highly for its rugged build and compelling spec sheet at its price.

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.