Side by side

Christopher Ward C1 Moonphase 37vsSeiko Prospex Sea

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

C1 Moonphase 37
Christopher WardC1 Moonphase 37
MSRP $3,050
Prospex Sea
SeikoProspex Sea
MSRP $900

At a glance

16 of 29 specs differ
Diameter
C1 Moonphase 3744.07mm
Prospex Sea41mm
Power Reserve
C1 Moonphase 3738h
Prospex Sea70h
Water Resistance
C1 Moonphase 3730m
Prospex Sea200m
MSRP
C1 Moonphase 37$3,050
Prospex Sea$900

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
44.07mm
41mm
Thickness
13.1mm
12.3mm
Lug-to-Lug
44.07mm
46.9mm
Finish
Brushed + Polished
Brushed and polished
Water Resistance
30m
200m

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Blue
Black
Lume
SLN X1 WL C1
LumiBrite on hands, index(es) and bezel

Movement

5 specs
Caliber
SW220
6R35
Beat Rate
4 vph
28,800 vph
Power Reserve
38h
70h
Jewels
26
24
Complications
Moonphase
None

Pricing

1 specs
MSRP
$3,050
$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 C1 Moonphase 37

Owners widely praise the Christopher Ward C1 Moonphase 37 for its aventurine dial and moon display, with one user awarding it a perfect score for its celestial theme. However, the lack of hour markers and lume-less hands make time-telling difficult, and hands can disappear against the dial. The COSC-certified movement averages +2.3 seconds per day, and the bracelet clasp is noted for comfort. The moonphase complication itself is reported by one owner to be inaccurate despite manufacturer attempts to correct it, though other users view such complications as primarily decorative. The 38-hour power reserve is considered short. Overall, owners rate the Christopher Ward C1 Moonphase 37 highly for its striking aventurine dial and moon focus, despite challenges with legibility and the practical accuracy of its moonphase complication.

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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