Which is cheaper, the Sheffield 1A or the Seiko Monster?

At MSRP the Sheffield 1A is the cheaper of the two at $223, against $550 for the Seiko Monster — a $327 gap before any retailer discounting.

Which is bigger, the Sheffield 1A or the Seiko Monster?

The Seiko Monster wears larger at 42.4mm versus 40mm for the Sheffield 1A — a 2.4mm difference across the dial.

What movement does the Sheffield 1A run compared to the Seiko Monster?

Both watches run automatic movements — the Sheffield 1A uses the Seiko NH35A and the Seiko Monster uses the 4R36.

Side by side

Sheffield 1AvsSeiko Monster

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

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Sheffield 1A

diver-1a-40mm-white

MSRP $223

Seiko Monster

srpe27

MSRP $550

At a glance

10 of 29 specs differ

Diameter

1A40mm

Monster42.4mm

Power Reserve

1A—

Monster41h

Water Resistance

1A200m

Monster200m

MSRP

1A$223

Monster$550

Full specifications

Case

3 specs

Diameter

40mm

42.4mm

Thickness

12.8mm

13.4mm

Lug-to-Lug

46mm

49.4mm

Crystal & Dial

3 specs

Crystal

Sapphire

Hardlex

Dial Color

White/Blue

Black

Lume

Swiss blue lume

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Seiko NH35A

4R36

Power Reserve

—

41h

Jewels

Pricing

1 specs

MSRP

$223

$550

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Sheffield 1AvsSeiko Monster

At a glance

Full specifications

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