Side by side

Erebus Watches Ascent 40 GMTvsSeiko Prospex SPEEDTIMER Mechanical

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

Ascent 40 GMT
Erebus WatchesAscent 40 GMT
MSRP $429
Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995
What people say

Owners + reviewers, side by side

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

Erebus Watches Ascent 40 GMT

Owners widely praise the Erebus Watches ASCENT for its stunning dial and excellent lume, with many finding it gorgeous and beautiful beyond comprehension. The watch is also noted for its comfortable wearability, attributed to its 40mm case, and the bracelet's micro-adjustable clasp and well-finished screws receive specific commendation. Some owners consider the Miyota 9075 movement excellent for the price, with one reporting accuracy of +1 second per day. However, import duties are a significant concern for some buyers, and the polished case sides are noted to lack a scratch-resistant coating. On balance, owners rate the Erebus Watches ASCENT highly for its aesthetic appeal and comfortable wearability at its price point.

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.

At a glance

13 of 29 specs differ
Diameter
Ascent 40 GMT40mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
Ascent 40 GMT
Prospex SPEEDTIMER Mechanical72h
Water Resistance
Ascent 40 GMT100m
Prospex SPEEDTIMER Mechanical200m
MSRP
Ascent 40 GMT$429
Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs
Category
Chronograph
Diameter
40mm
39.5mm
Thickness
12.4mm
12mm
Lug-to-Lug
46mm
44.5mm
Water Resistance
100m
200m

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Malachite
Black
Lume
BGW9 Super-LumiNova®
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Miyota 9075
6R55
Power Reserve
72h
Jewels
25
24

Pricing

1 specs
MSRP
$429
$995
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