Which is cheaper, the Seiko 5 Sports Field series or the Undone Terra II Blue Lagoon Automatic?

At MSRP the Seiko 5 Sports Field series is the cheaper of the two at $315, against $325 for the Undone Terra II Blue Lagoon Automatic — a $10 gap before any retailer discounting.

Which is bigger, the Seiko 5 Sports Field series or the Undone Terra II Blue Lagoon Automatic?

The Seiko 5 Sports Field series wears larger at 39.4mm versus 37mm for the Undone Terra II Blue Lagoon Automatic — a 2.4mm difference across the dial.

Which has better water resistance, the Seiko 5 Sports Field series or the Undone Terra II Blue Lagoon Automatic?

The Undone Terra II Blue Lagoon Automatic is rated to 50m versus 10m for the Seiko 5 Sports Field series.

What movement does the Seiko 5 Sports Field series run compared to the Undone Terra II Blue Lagoon Automatic?

Both watches run automatic movements — the Seiko 5 Sports Field series uses the Seiko 4R36 and the Undone Terra II Blue Lagoon Automatic uses the Seiko NH35.

Side by side

Seiko 5 Sports Field seriesvsUndone Terra II Blue Lagoon Automatic

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

Add a watch

Seiko 5 Sports Field series

MSRP $315

See the full 5 Sports Field series

Undone Terra II Blue Lagoon Automatic

MSRP $325

See the full Terra II Blue Lagoon Automatic

At a glance

14 of 29 specs differ

Diameter

5 Sports Field series39.4mm

Terra II Blue Lagoon Automatic37mm

Power Reserve

5 Sports Field series41h

Terra II Blue Lagoon Automatic—

Water Resistance

5 Sports Field series100m

Terra II Blue Lagoon Automatic50m

MSRP

5 Sports Field series$315

Terra II Blue Lagoon Automatic$325

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal

Hardlex

—

Crystal Shape

Curved

—

Dial Color

—

Lume

LumiBrite on hands and index(es)

None

Movement

3 specs

Caliber

Seiko 4R36

Seiko NH35

Power Reserve

41h

—

Jewels

Pricing

1 specs

MSRP

$315

$325

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Seiko 5 Sports Field seriesvsUndone Terra II Blue Lagoon Automatic

At a glance

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