Which is cheaper, the Formex Reef 39.5 mm or the Sheffield 1A 38?

At MSRP the Sheffield 1A 38 is the cheaper of the two at $238, against $2,230 for the Formex Reef 39.5 mm — a $1,992 gap before any retailer discounting.

Which is bigger, the Formex Reef 39.5 mm or the Sheffield 1A 38?

The Formex Reef 39.5 mm wears larger at 39.5mm versus 38mm for the Sheffield 1A 38 — a 1.5mm difference across the dial.

Which has better water resistance, the Formex Reef 39.5 mm or the Sheffield 1A 38?

The Formex Reef 39.5 mm is rated to 300m versus 200m for the Sheffield 1A 38.

What movement does the Formex Reef 39.5 mm run compared to the Sheffield 1A 38?

Both watches run automatic movements — the Formex Reef 39.5 mm uses the Sellita SW300-1 and the Sheffield 1A 38 uses the Seiko NH35.

Side by side

Formex Reef 39.5 mmvsSheffield 1A 38

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

Add a watch

Formex Reef 39.5 mm

reef-39.5-automatic-chronometer-cosc-300m-bahama-blue

MSRP $2,230

Sheffield 1A 38

1a-38-blue

MSRP $238

At a glance

10 of 29 specs differ

Diameter

Reef 39.5 mm39.5mm

1A 3838mm

Power Reserve

Reef 39.5 mm56h

1A 38—

Water Resistance

Reef 39.5 mm300m

1A 38200m

MSRP

Reef 39.5 mm$2,230

1A 38$238

Full specifications

Case

5 specs

Diameter

39.5mm

38mm

Thickness

11mm

12.8mm

Lug-to-Lug

45.5mm

46mm

Lug Width

22mm

20mm

Water Resistance

300m

200m

Crystal & Dial

2 specs

Dial Color

Bahama Blue

Blue

Lume

Super-LumiNova

None

Movement

2 specs

Caliber

Sellita SW300-1

Seiko NH35

Power Reserve

56h

—

Pricing

1 specs

MSRP

$2,230

$238

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Formex Reef 39.5 mmvsSheffield 1A 38

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