Which is cheaper, the Marathon Arctic OSAR 46mm Automatic or the Seiko Prospex LX line?

At MSRP the Marathon Arctic OSAR 46mm Automatic is the cheaper of the two at $2,500, against $5,500 for the Seiko Prospex LX line — a $3,000 gap before any retailer discounting.

Which is bigger, the Marathon Arctic OSAR 46mm Automatic or the Seiko Prospex LX line?

The Marathon Arctic OSAR 46mm Automatic wears larger at 46mm versus 44.8mm for the Seiko Prospex LX line — a 1.2mm difference across the dial.

Which has better water resistance, the Marathon Arctic OSAR 46mm Automatic or the Seiko Prospex LX line?

The Marathon Arctic OSAR 46mm Automatic is rated to 300m versus 20m for the Seiko Prospex LX line.

Which has a longer power reserve, the Marathon Arctic OSAR 46mm Automatic or the Seiko Prospex LX line?

The Seiko Prospex LX line carries a 72-hour power reserve against 40 hours on the Marathon Arctic OSAR 46mm Automatic.

What movement does the Marathon Arctic OSAR 46mm Automatic run compared to the Seiko Prospex LX line?

The Marathon Arctic OSAR 46mm Automatic runs a automatic caliber (Sellita SW220-1), while the Seiko Prospex LX line runs a spring drive (5R66).

Side by side

Marathon Arctic OSAR 46mm AutomaticvsSeiko Prospex LX line

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

Marathon Arctic OSAR 46mm Automatic

46mm-arctic-original-sar-w-date-on-3-piece-rubber-strap-kit-osar-d

MSRP $2,500

Seiko Prospex LX line

snr025j1

MSRP $5,500

At a glance

15 of 29 specs differ

Diameter

Arctic OSAR 46mm Automatic46mm

Prospex LX line44.8mm

Power Reserve

Arctic OSAR 46mm Automatic40h

Prospex LX line72h

Water Resistance

Arctic OSAR 46mm Automatic300m

Prospex LX line200m

MSRP

Arctic OSAR 46mm Automatic$2,500

Prospex LX line$5,500

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Inner

Super-clear coating

Dial Color

White

Black

Lume

None

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

Sellita SW220-1

5R66

Type

Automatic

Spring Drive

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$2,500

$5,500

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Marathon Arctic OSAR 46mm Automatic

Owners widely praise the Marathon Arctic OSAR 46mm Automatic for its overbuilt toughness and industrial, instrument-like aesthetic, with some preferring the Arctic dial for legibility. One owner notes the automatic movement may be unnecessary for rough use compared to a quartz option. Reviewers mention the MaraGlo luminous paint and a Sellita SW200-1 automatic movement. Some owners question its rising price and luxury positioning, with one reporting poor lume and movement performance. Overall, owners value the Marathon Arctic OSAR 46mm Automatic for its robust build and utilitarian design.

Reddit·3

A Blog to Watch

Seiko Prospex LX line

Owners widely report the dial's blue-green sunburst is phenomenal, and the sapphire glass features blue AR coating. Some owners feel the high price limits discounts and sales, with one AD noting extremely low sales due to the cost. One owner reported DLC peeling off a two-week-old watch, and another noted quality control issues like bezel inserts and fallen second hands. On balance, owners consider the Seiko Prospex LX line a nicely built watch, though pricing led to poor sales and its discontinuation.

Reddit·3

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