Side by side

Maen Manhattan 40vsSeiko Prospex Sea

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

Manhattan 40
MaenManhattan 40
MSRP $799
Prospex Sea
SeikoProspex Sea
MSRP $1,100

At a glance

14 of 29 specs differ
Diameter
Manhattan 4040mm
Prospex Sea41.3mm
Power Reserve
Manhattan 4040h
Prospex Sea72h
Water Resistance
Manhattan 40100m
Prospex Sea300m
MSRP
Manhattan 40$799
Prospex Sea$1,100

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
40mm
41.3mm
Thickness
12.5mm
Lug-to-Lug
48.2mm
Lug Width
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
M3.1.1
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
6R55
Power Reserve
40h
72h
Jewels
25
24

Pricing

1 specs
MSRP
$799
$1,100

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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.

Maen Manhattan 40

Owners appreciate the Maen Manhattan 40's thin case and unique dial, with some finding its proportions too large for smaller wrists. One owner noted a snagging crown and difficult winding action. Accuracy figures vary, with one owner reporting +18s/d to +24s/d on the 37mm version, while another owner of the 40mm model did not specify accuracy. On balance, owners and reviewers find the Maen Manhattan 40 to be a good value, with its thinness and dial finishing being key strengths.

Seiko Prospex Sea

Seiko Prospex Sea models are widely praised for their excellent build quality, value for money, and comfortable wearability, with many appreciating the vintage-inspired designs and robust construction. Owners note the silicone straps are surprisingly comfortable and well-finished, and the Lumibrite lume is excellent. However, some find the 44.3mm size and thickness too large for smaller wrists, though others report the sizing as perfect. The 6R15 movement in some variants offers accuracy around +4 seconds per day with a 50-hour power reserve, while newer movements offer more. Some models are criticized for a bracelet width not matching the case size or a rudimentary clasp for their price point. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its impressive case work and finishing at its price point.

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