Which is bigger, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Seiko Prospex LX line?

The Seiko Prospex LX line wears larger at 44.8mm versus 41mm for the Marathon OSAR-D (Original SAR with Date) Automatic 41mm — a 3.8mm difference across the dial.

What movement does the Marathon OSAR-D (Original SAR with Date) Automatic 41mm run compared to the Seiko Prospex LX line?

The Marathon OSAR-D (Original SAR with Date) Automatic 41mm runs a automatic caliber (Sellita SW220-1), while the Seiko Prospex LX line runs a spring drive (5R66).

Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsSeiko Prospex LX line

Q: Which is cheaper, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Seiko Prospex LX line?

At MSRP the Marathon OSAR-D (Original SAR with Date) Automatic 41mm is the cheaper of the two at $1,800, against $5,500 for the Seiko Prospex LX line — a $3,700 gap before any retailer discounting.

Q: Which has a longer power reserve, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Seiko Prospex LX line?

The Seiko Prospex LX line carries a 72-hour power reserve against 40 hours on the Marathon OSAR-D (Original SAR with Date) Automatic 41mm.

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

Marathon OSAR-D (Original SAR with Date) Automatic 41mm

41mm-original-sar-w-date-osar-d

MSRP $1,800

Seiko Prospex LX line

snr025j1

MSRP $5,500

At a glance

14 of 29 specs differ

Diameter

OSAR-D (Original SAR with Date) Automatic 41mm41mm

Prospex LX line44.8mm

Power Reserve

OSAR-D (Original SAR with Date) Automatic 41mm40h

Prospex LX line72h

Water Resistance

OSAR-D (Original SAR with Date) Automatic 41mm300m

Prospex LX line200m

MSRP

OSAR-D (Original SAR with Date) Automatic 41mm$1,800

Prospex LX line$5,500

Full specifications

Case

7 specs

Crystal & Dial

2 specs

AR Coating

Inner

Super-clear coating

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

$1,800

$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 OSAR-D (Original SAR with Date) Automatic 41mm

The Marathon OSAR-D (Original SAR with Date) Automatic 41mm is noted for its highly legible white dial with applied hour markers and a functional date magnifier, emphasizing its tool-watch purpose. Its Swiss-made Sellita SW200-1 movement is considered reliable and serviceable. One reviewer found the bracelet lacked refinement and preferred the rubber strap option. Overall, owners and reviewers appreciate the Marathon OSAR-D (Original SAR with Date) Automatic 41mm for its excellent legibility and robust movement.

Fratello

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.

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