Which is cheaper, the Seestern S450 Ocean Star or the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)?

At MSRP the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap) is the cheaper of the two at $223, against $299 for the Seestern S450 Ocean Star — a $76 gap before any retailer discounting.

Which is bigger, the Seestern S450 Ocean Star or the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)?

The Seestern S450 Ocean Star wears larger at 40mm versus 38mm for the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap) — a 2mm difference across the dial.

Which has better water resistance, the Seestern S450 Ocean Star or the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)?

The Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap) is rated to 200m versus 100m for the Seestern S450 Ocean Star.

What movement does the Seestern S450 Ocean Star run compared to the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)?

Both watches run automatic movements — the Seestern S450 Ocean Star uses the TMI NH35A and the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap) uses the Seiko NH35.

Side by side

Seestern S450 Ocean StarvsSheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)

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

Add a watch

Seestern S450 Ocean Star

S450.WS

MSRP $299

Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)

MSRP $223

At a glance

13 of 29 specs differ

Diameter

S450 Ocean Star40mm

1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)38mm

Power Reserve

S450 Ocean Star41h

1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)—

Water Resistance

S450 Ocean Star100m

1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)200m

MSRP

S450 Ocean Star$299

1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)$223

Full specifications

Case

5 specs

Diameter

40mm

38mm

Thickness

12mm

12.8mm

Lug-to-Lug

48mm

46mm

Material

316L Stainless Steel

Stainless Steel

Water Resistance

100m

200m

Crystal & Dial

2 specs

Dial Color

White

Blue

Lume

Tritium

None

Movement

5 specs

Caliber

TMI NH35A

Seiko NH35

Beat Rate

21,600 vph

28,800 vph

Power Reserve

41h

—

Jewels

Complications

GMT, Date

None

Pricing

1 specs

MSRP

$299

$223

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At a glance

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