What movement does the Marathon OSAR-D (Original SAR with Date) Automatic 36mm run compared to the Formex Reef 42 mm?

Both watches run automatic movements — the Marathon OSAR-D (Original SAR with Date) Automatic 36mm uses the Sellita SW220-1 and the Formex Reef 42 mm uses the Sellita SW300-1.

Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 36mmvsFormex Reef 42 mm

Q: Which is cheaper, the Marathon OSAR-D (Original SAR with Date) Automatic 36mm or the Formex Reef 42 mm?

At MSRP the Marathon OSAR-D (Original SAR with Date) Automatic 36mm is the cheaper of the two at $1,200, against $2,414 for the Formex Reef 42 mm — a $1,214 gap before any retailer discounting.

Q: Which is bigger, the Marathon OSAR-D (Original SAR with Date) Automatic 36mm or the Formex Reef 42 mm?

The Formex Reef 42 mm wears larger at 42mm versus 36mm for the Marathon OSAR-D (Original SAR with Date) Automatic 36mm — a 6mm difference across the dial.

Q: Which has a longer power reserve, the Marathon OSAR-D (Original SAR with Date) Automatic 36mm or the Formex Reef 42 mm?

The Formex Reef 42 mm carries a 56-hour power reserve against 40 hours on the Marathon OSAR-D (Original SAR with Date) Automatic 36mm.

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

Marathon OSAR-D (Original SAR with Date) Automatic 36mm

36mm-original-sar-w-date-osar-d

MSRP $1,200

Formex Reef 42 mm

reef-42mm-automatic-cosc-300m-black

MSRP $2,414

At a glance

9 of 29 specs differ

Diameter

OSAR-D (Original SAR with Date) Automatic 36mm36mm

Reef 42 mm42mm

Power Reserve

OSAR-D (Original SAR with Date) Automatic 36mm40h

Reef 42 mm56h

Water Resistance

OSAR-D (Original SAR with Date) Automatic 36mm300m

Reef 42 mm300m

MSRP

OSAR-D (Original SAR with Date) Automatic 36mm$1,200

Reef 42 mm$2,414

Full specifications

Case

5 specs

Diameter

36mm

42mm

Thickness

13mm

11.4mm

Lug-to-Lug

43.5mm

47mm

Lug Width

18mm

22mm

Material

316L Stainless Steel

Stainless Steel

Crystal & Dial

1 specs

Lume

None

Super-LumiNova

Movement

2 specs

Caliber

Sellita SW220-1

Sellita SW300-1

Power Reserve

40h

56h

Pricing

1 specs

MSRP

$1,200

$2,414

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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 36mm

Owners widely praise the Marathon OSAR-D (Original SAR with Date) Automatic 36mm for its exceptional legibility, featuring large hour markers and MaraGlo lume. The watch is noted for its comfortable wearability and competent Swiss-made Selitta SW200-1 automatic movement, offering 300-meter water resistance and a sapphire crystal. Some enthusiasts find the price of $1,380 USD on rubber to be excessive, particularly compared to past models or other brands, and the Spartan bracelet is described as lacking refinement. On balance, owners and reviewers find the Marathon OSAR-D Automatic 36mm a reliable and functional tool watch, with its clear dial and robust build being the primary draws.

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

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