Side by side

Sugess MoonPhase Master S389vsSeiko Prospex SPEEDTIMER Mechanical

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

MoonPhase Master S389
SugessMoonPhase Master S389
MSRP $599
Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995

At a glance

15 of 29 specs differ
Diameter
MoonPhase Master S38940mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
MoonPhase Master S38935h
Prospex SPEEDTIMER Mechanical72h
Water Resistance
MoonPhase Master S38950m
Prospex SPEEDTIMER Mechanical200m
MSRP
MoonPhase Master S389$599
Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

4 specs
Diameter
40mm
39.5mm
Lug-to-Lug
46mm
44.5mm
Water Resistance
50m
200m
Caseback
Display
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
2 Salmon
Black
Lume
Tritium
LumiBrite on hands and index(es)

Movement

6 specs
Caliber
Seagull ST19
6R55
Type
Manual
Automatic
Beat Rate
3 vph
28,800 vph
Power Reserve
35h
72h
Jewels
25
24
Complications
GMT, Chronograph, Moonphase, Date
None

Pricing

1 specs
MSRP
$599
$995

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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.

Sugess MoonPhase Master S389

Owners widely praise the Sugess MoonPhase Master S389 for its beautiful dial and glowing moonphase, with some finding it a stunner that exceeds expectations and a bargain for the price. However, reviewers and owners alike flag rotor noise and thickness as potential drawbacks, and one owner reported receiving a defective unit. Accuracy is reported at -6 seconds per day, and while the dial features applied markers and polished hands, the movement finishing is noted as rough under magnification. Overall, owners rate the Sugess MoonPhase Master S389 highly for its aesthetic appeal and value, despite some concerns regarding rotor noise and build quality consistency.

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

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