Side by side

Christopher Ward C65 Aquitaine Bronze COSCvsSeiko Prospex Sea

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

C65 Aquitaine Bronze COSC
Christopher WardC65 Aquitaine Bronze COSC
MSRP $1,695
Prospex Sea
SeikoProspex Sea
MSRP $900

At a glance

17 of 29 specs differ
Diameter
C65 Aquitaine Bronze COSC46.68mm
Prospex Sea41mm
Power Reserve
C65 Aquitaine Bronze COSC38h
Prospex Sea70h
Water Resistance
C65 Aquitaine Bronze COSC200m
Prospex Sea200m
MSRP
C65 Aquitaine Bronze COSC$1,695
Prospex Sea$900

Full specifications

Case

7 specs
Diameter
46.68mm
41mm
Thickness
12.45mm
12.3mm
Lug-to-Lug
46.68mm
46.9mm
Lug Width
22mm
20mm
Material
Bronze
Stainless Steel
Finish
Brushed + Polished
Brushed and polished
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Blue
Black
Lume
SLN X1 BL Old Radium
LumiBrite on hands, index(es) and bezel

Movement

5 specs
Caliber
SW200
6R35
Beat Rate
4 vph
28,800 vph
Power Reserve
38h
70h
Jewels
26
24
Complications
Moonphase, Day-date, Date
None

Pricing

1 specs
MSRP
$1,695
$900

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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.

Christopher Ward C65 Aquitaine Bronze COSC

Owners widely praise the Christopher Ward C65 Aquitaine Bronze COSC for its comfortable wearability, durable case and bezel, and smooth winding action, with one owner finding its case superior to a Tudor's. However, accuracy is a significant concern, with one owner reporting +17 seconds per day. The rubber strap is also noted as lacking refinement, and some suggest design tweaks for greater brand uniqueness. Overall, owners rate the Christopher Ward C65 Aquitaine Bronze COSC highly for its wearability and case finishing, despite accuracy concerns with the Sellita SW330-2 movement.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent lume, robust build, and value, with many highlighting the comfortable 4 o'clock crown and reliable movements. Reviewers note impressive case finishing and attractive dials, with specific models lauded for their gradient blue designs and smooth bezel actions. Accuracy figures vary, with one owner reporting +9 seconds/day after demagnetization, while others find the watches to be good first "proper" watches. Some owners find the stock rubber straps uncomfortable or the overall size substantial on smaller wrists. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its combination of strong dive watch functionality and appealing design at its price point.

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