Side by side

Erebus Watches Ascent 40 GMTvsSeiko Prospex Sea

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 Sea
SeikoProspex Sea
MSRP $625
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 Sea

The Seiko Prospex Sea is widely praised for its excellent value, solid build quality, and comfortable wearability, with many models featuring impressive lume and attractive dials. Owners and reviewers highlight the modern upgrades on classic designs, such as drilled lugs and reliable movements with hacking and hand-winding capabilities. Some models are noted for their refined case finishing and scratch resistance. Accuracy figures vary, with one owner reporting approximately 4 seconds fast per day, while others find the movements offer good performance for the price. Concerns raised by owners and reviewers include clasps that can feel generic or cheap, and lug widths that some find disproportionate to the case size on certain models. The thickness and weight of some Prospex Sea watches are also noted as substantial. The GMT function on specific models is considered secondary and difficult to read for true travel purposes.

At a glance

13 of 29 specs differ
Diameter
Ascent 40 GMT40mm
Prospex Sea43.8mm
Power Reserve
Ascent 40 GMT
Prospex Sea41h
Water Resistance
Ascent 40 GMT100m
Prospex Sea200m
MSRP
Ascent 40 GMT$429
Prospex Sea$625

Full specifications

Case

6 specs
Category
Diver
Diameter
40mm
43.8mm
Thickness
12.4mm
12.8mm
Lug-to-Lug
46mm
48.7mm
Lug Width
20mm
22mm
Water Resistance
100m
200m

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Malachite
Black
Lume
BGW9 Super-LumiNova®
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Miyota 9075
4R35
Power Reserve
41h
Jewels
25
23

Pricing

1 specs
MSRP
$429
$625
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