Which has better water resistance, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Aera Instruments C-1?

The Marathon OSAR-D (Original SAR with Date) Automatic 41mm is rated to 300m versus 100m for the Aera Instruments C-1.

Which has a longer power reserve, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Aera Instruments C-1?

The Aera Instruments C-1 carries a 56-hour power reserve against 40 hours on the Marathon OSAR-D (Original SAR with Date) Automatic 41mm.

What movement does the Marathon OSAR-D (Original SAR with Date) Automatic 41mm run compared to the Aera Instruments C-1?

Both watches run automatic movements — the Marathon OSAR-D (Original SAR with Date) Automatic 41mm uses the Sellita SW220-1 and the Aera Instruments C-1 uses the SW510 BH B.

Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 41mmvsAera Instruments C-1

Q: Which is cheaper, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Aera Instruments C-1?

At MSRP the Marathon OSAR-D (Original SAR with Date) Automatic 41mm is the cheaper of the two at $1,800, against $2,200 for the Aera Instruments C-1 — a $400 gap before any retailer discounting.

Q: Which is bigger, the Marathon OSAR-D (Original SAR with Date) Automatic 41mm or the Aera Instruments C-1?

The Aera Instruments C-1 wears larger at 42mm versus 41mm for the Marathon OSAR-D (Original SAR with Date) Automatic 41mm — a 1mm difference across the dial.

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

Aera Instruments C-1

MSRP $2,200

At a glance

12 of 29 specs differ

Diameter

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

C-142mm

Power Reserve

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

C-156h

Water Resistance

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

C-1100m

MSRP

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

C-1$2,200

Full specifications

Case

7 specs

Crystal & Dial

1 specs

Dial Color

Black

Cloud

Movement

3 specs

Caliber

Sellita SW220-1

SW510 BH B

Power Reserve

40h

56h

Jewels

Pricing

1 specs

MSRP

$1,800

$2,200

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