Which is cheaper, the Formex Reef 42 mm or the Sheffield 1A?

At MSRP the Sheffield 1A is the cheaper of the two at $223, against $2,414 for the Formex Reef 42 mm — a $2,191 gap before any retailer discounting.

Which is bigger, the Formex Reef 42 mm or the Sheffield 1A?

The Formex Reef 42 mm wears larger at 42mm versus 40mm for the Sheffield 1A — a 2mm difference across the dial.

Which has better water resistance, the Formex Reef 42 mm or the Sheffield 1A?

The Formex Reef 42 mm is rated to 300m versus 200m for the Sheffield 1A.

What movement does the Formex Reef 42 mm run compared to the Sheffield 1A?

Both watches run automatic movements — the Formex Reef 42 mm uses the Sellita SW300-1 and the Sheffield 1A uses the Seiko NH35A.

Side by side

Formex Reef 42 mmvsSheffield 1A

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

Add a watch

Formex Reef 42 mm

reef-42mm-automatic-cosc-300m-black

MSRP $2,414

Sheffield 1A

diver-1a-40mm-white

MSRP $223

At a glance

10 of 29 specs differ

Diameter

Reef 42 mm42mm

1A40mm

Power Reserve

Reef 42 mm56h

1A—

Water Resistance

Reef 42 mm300m

1A200m

MSRP

Reef 42 mm$2,414

1A$223

Full specifications

Case

5 specs

Diameter

42mm

40mm

Thickness

11.4mm

12.8mm

Lug-to-Lug

47mm

46mm

Lug Width

22mm

20mm

Water Resistance

300m

200m

Crystal & Dial

2 specs

Dial Color

Black

White/Blue

Lume

Super-LumiNova

Swiss blue lume

Movement

2 specs

Caliber

Sellita SW300-1

Seiko NH35A

Power Reserve

56h

—

Pricing

1 specs

MSRP

$2,414

$223

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Formex Reef 42 mmvsSheffield 1A

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