Side by side

Spinnaker Challenger AutomaticvsTimefactors Speedbird GMT

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.

Spinnaker Challenger Automatic

The Spinnaker Challenger Automatic is widely praised for its fun, playful design, solid build quality, and satisfying bezel action. Owners appreciate the comfortable 42mm DLC-coated case and the thoughtful integration of the Popeye theme, with the character serving as the hour and minute hands. Reviewers note the reliable Seiko NH35 movement and 300m water resistance. Some owners find the blue lume weaker than expected, and the ultra-domed sapphire crystal presents challenges for photography. The thick rubber strap is also cited as difficult to manage. Overall, owners and reviewers rate the Spinnaker Challenger Automatic highly for its unique character integration and solid dive watch fundamentals at its price point.

Timefactors Speedbird GMT

Owners widely praise the Timefactors Speedbird GMT for its quality and value, with many appreciating its 36mm case size for wearability and its surprisingly good bracelet. Some owners note the GMT function is on an inner ring, and one owner found the date wheel sunken. The watch is noted for its classic aesthetic and is considered a good value, though purchasing requires patience due to limited order windows. Overall, owners rate the Timefactors Speedbird GMT highly for its wearability and value at the price point.

At a glance

13 of 29 specs differ
Diameter
Challenger Automatic42mm
Speedbird GMT36mm
Power Reserve
Challenger Automatic
Speedbird GMT
Water Resistance
Challenger Automatic200m
Speedbird GMT100m
MSRP
Challenger Automatic$289
Speedbird GMT$315

Full specifications

Case

7 specs
Category
Diver
Diameter
42mm
36mm
Thickness
19mm
11.6mm
Lug-to-Lug
49.5mm
42.5mm
Lug Width
22mm
18mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

2 specs
Dial Color
Blue
Black
Lume
None
Super Luminova X1 C3

Movement

3 specs
Caliber
Seiko NH35
Ronda 515
Type
Automatic
Quartz
Power Reserve
0h

Pricing

1 specs
MSRP
$289
$315
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