Side by side

Sugess MoonPhase Master S437vsFormex Reef 39.5 mm

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

MoonPhase Master S437
SugessMoonPhase Master S437
MSRP $549
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230
What people say

Owners + reviewers, side by side

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

Sugess MoonPhase Master S437

Owners widely praise the Sugess MoonPhase Master S437 for its striking dial, often described as deep blue or aventurine, and its value, with prices around $171-$175. The Seagull ST1908 movement is noted as accurate, with one owner reporting +3 seconds over 18 hours and another +7 seconds daily, and its hand-winding action is smooth. However, the watch's thickness, potentially over 13mm, is a concern for some as a dress watch, and the long lugs may pose a fit issue on smaller wrists. A potential design flaw in the moonphase window, showing two phases simultaneously, is flagged as a deal-breaker by some. The included leather straps are considered stiff and uncomfortable, and the domed sapphire crystal lacks AR coating, leading to reflections. On balance, owners rate the Sugess MoonPhase Master S437 highly for its stunning dial and value, despite some fit and finishing concerns.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

At a glance

13 of 29 specs differ
Diameter
MoonPhase Master S43740mm
Reef 39.5 mm39.5mm
Power Reserve
MoonPhase Master S43748h
Reef 39.5 mm56h
Water Resistance
MoonPhase Master S43750m
Reef 39.5 mm300m
MSRP
MoonPhase Master S437$549
Reef 39.5 mm$2,230

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
40mm
39.5mm
Thickness
13.5mm
11mm
Lug-to-Lug
47.8mm
45.5mm
Material
Stainless Steel/Rose Gold
Stainless Steel
Water Resistance
50m
300m
Caseback
Display
Solid

Crystal & Dial

2 specs
Dial Color
White
Bahama Blue
Lume
X1
Super-LumiNova

Movement

3 specs
Caliber
ST2528
Sellita SW300-1
Power Reserve
48h
56h
Complications
Moonphase, Date
None

Pricing

1 specs
MSRP
$549
$2,230
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