Which is cheaper, the Loresum J1 or the Seiko Astron?

At MSRP the Loresum J1 is the cheaper of the two at $1,848, against $2,400 for the Seiko Astron — a $552 gap before any retailer discounting.

Which is bigger, the Loresum J1 or the Seiko Astron?

The Seiko Astron wears larger at 42mm versus 40mm for the Loresum J1 — a 2mm difference across the dial.

Which has better water resistance, the Loresum J1 or the Seiko Astron?

The Loresum J1 is rated to 50m versus 10m for the Seiko Astron.

What movement does the Loresum J1 run compared to the Seiko Astron?

The Loresum J1 runs a automatic caliber (Sellita SW200-1), while the Seiko Astron runs a quartz (Seiko 3X62).

Side by side

Loresum J1vsSeiko Astron

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

MSRP $1,848

MSRP $2,400

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At a glance

15 of 29 specs differ

Diameter

J140mm

Astron42mm

Power Reserve

J138h

Astron—

Water Resistance

J150m

Astron100m

MSRP

J1$1,848

Astron$2,400

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

—

Super-clear coating

Dial Color

—

Lume

None

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

Sellita SW200-1

Seiko 3X62

Type

Automatic

Quartz

Power Reserve

38h

Jewels

Pricing

1 specs

MSRP

$1,848

$2,400

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Loresum J1vsSeiko Astron

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