Which is cheaper, the Formex Reef 42 mm or the Sheffield 1A 40mm?

At MSRP the Sheffield 1A 40mm is the cheaper of the two at $228, against $2,414 for the Formex Reef 42 mm — a $2,186 gap before any retailer discounting.

Which is bigger, the Formex Reef 42 mm or the Sheffield 1A 40mm?

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

Which has better water resistance, the Formex Reef 42 mm or the Sheffield 1A 40mm?

The Formex Reef 42 mm is rated to 300m versus 200m for the Sheffield 1A 40mm.

Which has a longer power reserve, the Formex Reef 42 mm or the Sheffield 1A 40mm?

The Formex Reef 42 mm carries a 56-hour power reserve against 40 hours on the Sheffield 1A 40mm.

What movement does the Formex Reef 42 mm run compared to the Sheffield 1A 40mm?

Both watches run automatic movements — the Formex Reef 42 mm uses the Sellita SW300-1 and the Sheffield 1A 40mm uses the Seiko NH35.

Side by side

Formex Reef 42 mmvsSheffield 1A 40mm

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 40mm

allsport-1-auto

MSRP $228

At a glance

11 of 29 specs differ

Diameter

Reef 42 mm42mm

1A 40mm40mm

Power Reserve

Reef 42 mm56h

1A 40mm40h

Water Resistance

Reef 42 mm300m

1A 40mm200m

MSRP

Reef 42 mm$2,414

1A 40mm$228

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Dial Color

Black

—

Lume

Super-LumiNova

None

Movement

2 specs

Caliber

Sellita SW300-1

Seiko NH35

Power Reserve

56h

40h

Pricing

1 specs

MSRP

$2,414

$228

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Formex Reef 42 mmvsSheffield 1A 40mm

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