Side by side

Sheffield 1AvsSeiko Prospex Sea Save the Ocean Special Edition

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

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Sheffield 1A

Owners widely praise the Sheffield 1A for its superb quality, sturdiness, and value, with many finding its blue dial appealing and its construction more substantial than comparable models. One owner noted expensive shipping fees as a drawback, and another suggested the bezel action could be crisper. Overall, owners consider the Sheffield 1A a no-brainer for its affordability and quality.

Seiko Prospex Sea Save the Ocean Special Edition

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its attractive, unique, and textured dials, often described as having a "Grand Seiko feel" at a more accessible price point, with specific mentions of wave patterns, lagoon hues, and manta ray motifs. Owners appreciate the smooth bezel operation and satisfactory lume. Accuracy figures vary, with one owner reporting +5 seconds per day, while another notes a range from +1/+2 to about -6 seconds per day. The 6R35 movement offers a 70-hour power reserve, and some models feature sapphire crystals. Criticisms include a desire for exhibition casebacks and concerns about the quality and security of the stamped metal clasps and bracelets, which are frequently described as rattly or underwhelming, though this is noted as a common Seiko trait. Some owners are split on the number of Save the Ocean variations and dislike the cyclops magnifier.

At a glance

11 of 29 specs differ
Diameter
1A40mm
Prospex Sea Save the Ocean Special Edition45mm
Power Reserve
1A
Prospex Sea Save the Ocean Special Edition41h
Water Resistance
1A200m
Prospex Sea Save the Ocean Special Edition200m
MSRP
1A$223
Prospex Sea Save the Ocean Special Edition$625

Full specifications

Case

4 specs
Diameter
40mm
45mm
Thickness
12.8mm
13.2mm
Lug-to-Lug
46mm
47.7mm
Lug Width
20mm
22mm

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
White/Blue
Black
Lume
Swiss blue lume
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
4R36
Power Reserve
41h
Jewels
25
24

Pricing

1 specs
MSRP
$223
$625
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