Side by side

Marathon OSAR-D (Original SAR with Date) Automatic 46mmvsFormex Reef GMT

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

OSAR-D (Original SAR with Date) Automatic 46mm
MarathonOSAR-D (Original SAR with Date) Automatic 46mm
MSRP $2,500
Reef GMT
FormexReef GMT
MSRP $2,235

At a glance

10 of 29 specs differ
Diameter
OSAR-D (Original SAR with Date) Automatic 46mm46mm
Reef GMT42mm
Power Reserve
OSAR-D (Original SAR with Date) Automatic 46mm40h
Reef GMT56h
Water Resistance
OSAR-D (Original SAR with Date) Automatic 46mm300m
Reef GMT300m
MSRP
OSAR-D (Original SAR with Date) Automatic 46mm$2,500
Reef GMT$2,235

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
46mm
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 SW330-2
Power Reserve
40h
56h

Pricing

1 specs
MSRP
$2,500
$2,235

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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 46mm

The Marathon OSAR-D (Original SAR with Date) Automatic 46mm is widely regarded as a rugged and legible timepiece, featuring a familiar geometric dial with MaraGlo lume and a white dial with applied hour markers that enhance legibility. Owners and reviewers note its 300-meter water resistance and the reliable Swiss-made Sellita SW200-1 automatic movement with improved shock protection. The watch is described as large, thick, and heavy, with some owners finding it comfortable on the wrist while others note its substantial presence, particularly at a table. Overall, owners and reviewers appreciate the Marathon OSAR-D (Original SAR with Date) Automatic 46mm for its rugged build and excellent legibility.

Formex Reef GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

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