Side by side

Monta OceankingvsSeiko Prospex Sea 1965 Heritage Diver's Watch

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Oceanking
MontaOceanking
MSRP $2,550

At a glance

12 of 29 specs differ
Diameter
Oceanking40mm
Prospex Sea 1965 Heritage Diver's Watch40mm
Power Reserve
Oceanking40h
Prospex Sea 1965 Heritage Diver's Watch72h
Water Resistance
Oceanking305m
Prospex Sea 1965 Heritage Diver's Watch300m
MSRP
Oceanking$2,550
Prospex Sea 1965 Heritage Diver's Watch$1,300

Full specifications

Case

4 specs
Thickness
13mm
Lug-to-Lug
48mm
46.4mm
Lug Width
20mm
Water Resistance
305m
300m

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Blue
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Monta M-22
6R55
Power Reserve
40h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$2,550
$1,300

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What people say

Owners + reviewers, side by side

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

Monta Oceanking

Owners and reviewers widely praise the Monta Oceanking for its refined aesthetics, excellent fit and finish for its price point, and comfortable, supple bracelet with a micro-adjustment clasp. The watch features a legible dial with enlarged luminous markers and hands, a well-done glossy and deep bezel, and a svelte sub-41mm case with a shorter lug-to-lug. Some owners note minor gripes with bezel alignment and movement accuracy, while one reviewer found the tapering crown tricky to grip and the bezel had slight play. The Sellita SW300 movement provides a power reserve of either 42 or 56 hours, depending on the source, and the watch includes a date at six o'clock. Overall, owners and reviewers rate the Monta Oceanking highly for its comfortable wearability and tool-focused, sportier stance.

Seiko Prospex Sea 1965 Heritage Diver's Watch

The Seiko Prospex Sea 1965 Heritage Diver's Watch is praised for its refined engineering and updated features, including a 300m water resistance and a 72-hour power reserve from the Caliber 6R55 movement in a 40mm case. Owners note its better build quality and interesting finishing with a mix of polished and brushed surfaces. The "Tranquil Teal" variant features a jewel-toned dial with a rippling-water pattern. However, some owners consider the price too high, and concerns exist regarding the accuracy of the 6R movements, with some reporting theirs run slow. One review notes a reflective dial that impacts legibility. On balance, owners and reviewers appreciate the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined design and improved specifications over previous generations, despite some reservations about movement accuracy and price.

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