Side by side

Signum CerovsSeiko Prospex Sea

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

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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.

Signum Cero

Owners widely praise the Signum Cero's exceptional lume, satisfying bezel action, and distinctive dial design, with particular appreciation for the bronze case and green turquoise dial. One owner notes the watch wears a bit small and requires extra pressure to screw down the crown. The NH35 automatic movement powers the 39.5mm timepiece, which weighs a comfortable 47.25 grams with the buckle. Overall, owners rate the Signum Cero highly for its unique aesthetic and strong lume at the price point.

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value, solid build quality, and comfortable wearability, with many models featuring impressive lume and attractive dials. Owners and reviewers highlight the modern upgrades on classic designs, such as drilled lugs and reliable movements with hacking and hand-winding capabilities. Some models are noted for their refined case finishing and scratch resistance. Accuracy figures vary, with one owner reporting approximately 4 seconds fast per day, while others find the movements offer good performance for the price. Concerns raised by owners and reviewers include clasps that can feel generic or cheap, and lug widths that some find disproportionate to the case size on certain models. The thickness and weight of some Prospex Sea watches are also noted as substantial. The GMT function on specific models is considered secondary and difficult to read for true travel purposes.

At a glance

13 of 29 specs differ
Diameter
Cero39.5mm
Prospex Sea43.8mm
Power Reserve
Cero
Prospex Sea41h
Water Resistance
Cero200m
Prospex Sea200m
MSRP
Cero$519
Prospex Sea$625

Full specifications

Case

6 specs
Category
Diver
Diameter
39.5mm
43.8mm
Thickness
13.4mm
12.8mm
Lug-to-Lug
48.7mm
Lug Width
22mm
Material
Bronze
Stainless Steel

Crystal & Dial

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

Movement

3 specs
Caliber
Seiko NH35
Seiko 4R35
Power Reserve
41h
Jewels
0
23

Pricing

1 specs
MSRP
$519
$625
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