Side by side

Seiko Prospex SPEEDTIMER MechanicalvsStudio Underd0g Steffany Blue

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

What people say

Owners + reviewers, side by side

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

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.

Studio Underd0g Steffany Blue

Owners widely praise the Studio Underd0g Steffany Blue for its beautiful multilayer dial with a floating effect and vivid Super-LumiNova, with one owner finding it smaller and more beautiful than expected. The 37mm case wears nicely, though some find it slightly small for larger wrists. One owner notes the power reserve can fall short of the advertised 48 hours, sometimes lasting only about a day. Overall, owners rate the Studio Underd0g Steffany Blue highly for its striking dial and luminous display.

At a glance

15 of 29 specs differ
Diameter
Prospex SPEEDTIMER Mechanical39.5mm
Steffany Blue39.5mm
Power Reserve
Prospex SPEEDTIMER Mechanical72h
Steffany Blue
Water Resistance
Prospex SPEEDTIMER Mechanical200m
Steffany Blue
MSRP
Prospex SPEEDTIMER Mechanical$995
Steffany Blue$800

Full specifications

Case

5 specs
Category
Chronograph
Casual
Thickness
12mm
Lug-to-Lug
44.5mm
Lug Width
20mm
Water Resistance
200m

Crystal & Dial

4 specs
Crystal Shape
Curved
AR Coating
Anti-reflective coating on inner surface
Dial Color
Blue
Lume
LumiBrite on hands and index(es)
None

Movement

5 specs
Caliber
6R55
Type
Automatic
Manual
Power Reserve
72h
0h
Jewels
24
0
Hand-winding
No
Yes

Pricing

1 specs
MSRP
$995
$800
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