Which is bigger, the Seestern S450 Ocean Star or the Helgray Speedster (Racing Light Blue)?

The Seestern S450 Ocean Star wears larger at 40mm versus 39mm for the Helgray Speedster (Racing Light Blue) — a 1mm difference across the dial.

Which has better water resistance, the Seestern S450 Ocean Star or the Helgray Speedster (Racing Light Blue)?

The Seestern S450 Ocean Star is rated to 100m versus 30m for the Helgray Speedster (Racing Light Blue).

Which has a longer power reserve, the Seestern S450 Ocean Star or the Helgray Speedster (Racing Light Blue)?

The Seestern S450 Ocean Star carries a 41-hour power reserve against 40 hours on the Helgray Speedster (Racing Light Blue).

What movement does the Seestern S450 Ocean Star run compared to the Helgray Speedster (Racing Light Blue)?

Both watches run automatic movements — the Seestern S450 Ocean Star uses the TMI NH35A and the Helgray Speedster (Racing Light Blue) uses the Miyota 6S21.

Side by side

Seestern S450 Ocean StarvsHelgray Speedster (Racing Light Blue)

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

Seestern S450 Ocean Star

S450.WS

MSRP $299

Helgray Speedster (Racing Light Blue)

speedster-racing-light-blue

MSRP $299

At a glance

12 of 29 specs differ

Diameter

S450 Ocean Star40mm

Speedster (Racing Light Blue)39mm

Power Reserve

S450 Ocean Star41h

Speedster (Racing Light Blue)40h

Water Resistance

S450 Ocean Star100m

Speedster (Racing Light Blue)30m

MSRP

S450 Ocean Star$299

Speedster (Racing Light Blue)$299

Full specifications

Case

5 specs

Crystal & Dial

2 specs

Dial Color

White

Black

Lume

Tritium

None

Movement

5 specs

Caliber

TMI NH35A

Miyota 6S21

Beat Rate

21,600 vph

28,800 vph

Power Reserve

41h

40h

Jewels

Complications

GMT, Date

None

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