Which is cheaper, the Phoibos Reef Master or the Sheffield 1A?

At MSRP the Sheffield 1A is the cheaper of the two at $223, against $335 for the Phoibos Reef Master — a $112 gap before any retailer discounting.

Which is bigger, the Phoibos Reef Master or the Sheffield 1A?

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

What movement does the Phoibos Reef Master run compared to the Sheffield 1A?

Both watches run automatic movements — the Phoibos Reef Master uses the SII NH38 and the Sheffield 1A uses the Seiko NH35A.

Side by side

Phoibos Reef MastervsSheffield 1A

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

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Phoibos Reef Master

phoibos-reef-master-200m-automatic-diver-watch-py047a-shamrock-green

MSRP $335

Sheffield 1A

diver-1a-40mm-white

MSRP $223

At a glance

10 of 29 specs differ

Diameter

Reef Master42mm

1A40mm

Power Reserve

Reef Master40h

1A—

Water Resistance

Reef Master200m

1A200m

MSRP

Reef Master$335

1A$223

Full specifications

Case

4 specs

Diameter

42mm

40mm

Thickness

13mm

12.8mm

Lug-to-Lug

48mm

46mm

Lug Width

22mm

20mm

Crystal & Dial

3 specs

AR Coating

Yes

Inner

Dial Color

Green

White/Blue

Lume

Super-LumiNova

Swiss blue lume

Movement

2 specs

Caliber

SII NH38

Seiko NH35A

Power Reserve

40h

—

Pricing

1 specs

MSRP

$335

$223

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Phoibos Reef MastervsSheffield 1A

At a glance

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