Side by side

Spinnaker Dumas AutomaticvsTimefactors Speedbird GMT

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

Dumas Automatic
SpinnakerDumas Automatic
MSRP $239
What people say

Owners + reviewers, side by side

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

Spinnaker Dumas Automatic

Owners widely praise the Spinnaker Dumas Automatic for its attractive textured blue dial, applied indices, and well-finished case, noting its comfortable wearability due to a short lug-to-lug distance. Some owners flag the use of mineral crystal instead of sapphire and a bracelet with a learning curve and loose keeper. Overall, owners rate the Spinnaker Dumas Automatic highly for its aesthetics and case finishing 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
Dumas Automatic44mm
Speedbird GMT36mm
Power Reserve
Dumas Automatic40h
Speedbird GMT
Water Resistance
Dumas Automatic300m
Speedbird GMT100m
MSRP
Dumas Automatic$239
Speedbird GMT$315

Full specifications

Case

7 specs
Category
Diver
Diameter
44mm
36mm
Thickness
15mm
11.6mm
Lug-to-Lug
48mm
42.5mm
Lug Width
22mm
18mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

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

Movement

3 specs
Caliber
NH35
Ronda 515
Type
Automatic
Quartz
Power Reserve
40h

Pricing

1 specs
MSRP
$239
$315
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