Side by side

Monta AtlasvsSeiko Prospex Sea

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

Atlas
MontaAtlas
MSRP $2,150
Prospex Sea
SeikoProspex Sea
MSRP $595

At a glance

13 of 29 specs differ
Diameter
Atlas38.5mm
Prospex Sea41.7mm
Power Reserve
Atlas40h
Prospex Sea41h
Water Resistance
Atlas152m
Prospex Sea200m
MSRP
Atlas$2,150
Prospex Sea$595

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
38.5mm
41.7mm
Thickness
12.3mm
Lug-to-Lug
49.5mm
Lug Width
20mm
Water Resistance
152m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Silver
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Monta M-23
4R35
Power Reserve
40h
41h
Jewels
25
23

Pricing

1 specs
MSRP
$2,150
$595

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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 Atlas

The Monta Atlas is widely praised for its exceptional wearability, with its comfortable 38.5mm case size and buttery bracelet frequently highlighted. Owners and reviewers alike commend its fit and finish, noting a mix of brushed, polished, and blasted surfaces. However, the rehaut on the opaline silver dial is considered nearly illegible for the 24-hour GMT scale, leading some to suggest other dial colors are more practical for GMT functionality. One owner also flagged the crown as less sturdy than anticipated and noted the AR coating attracts fingerprints. Overall, owners and reviewers rate the Monta Atlas highly for its comfortable dimensions and appealing finishing.

From video reviewers

The Monta Opalin Silver's dial is a notable strength, particularly its subtle gradient effect that adds depth to the watch without being too flashy. The watch offers a notable value proposition due to its movement, typically found in more expensive timepieces. The bracelet can be prone to rattle, which might be a trade-off for some buyers.

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its excellent value, robust build, and superior lume, with many noting its comfortable wearability and faithful design recreations. Some owners report the watch can feel big, thick, and heavy on smaller wrists, while others find the sizing perfect. The bezel action is frequently highlighted as smooth and precise, often exceeding that of less expensive models. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its impressive finishing and value proposition.

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