Side by side

Spinnaker Dumas GMTvsLongines LONGINES SPIRIT FLYBACK PROTOTYPE

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
LONGINES SPIRIT FLYBACK PROTOTYPE
LonginesLONGINES SPIRIT FLYBACK PROTOTYPE
MSRP $7,400

At a glance

9 of 29 specs differ
Diameter
Dumas GMT44mm
LONGINES SPIRIT FLYBACK PROTOTYPE42mm
Power Reserve
Dumas GMT40h
LONGINES SPIRIT FLYBACK PROTOTYPE40h
Water Resistance
Dumas GMT300m
LONGINES SPIRIT FLYBACK PROTOTYPE100m
MSRP
Dumas GMT$399
LONGINES SPIRIT FLYBACK PROTOTYPE$7,400

Full specifications

Case

6 specs
Category
GMT
Chronograph
Diameter
44mm
42mm
Thickness
15mm
17mm
Lug-to-Lug
48mm
49.5mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
Blue
Green

Movement

1 specs
Caliber
Seiko NH34A
L791.4

Pricing

1 specs
MSRP
$399
$7,400

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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 GMT

Owners praise the Spinnaker Dumas GMT's satisfying lume, including on the crown, and good finishing, with one owner finding it wears well on a 17cm wrist. The watch features a Seiko NH34A GMT movement and a blue gradient dial. Reviewers note its 44mm diameter and 209g weight on the bracelet make it unsuitable for smaller wrists.

LONGINES SPIRIT FLYBACK PROTOTYPE

Owners widely praise the Longines Spirit Flyback Prototype for its attractive finishing, COSC-certified movement, and value as a flyback chronograph. Reviewers highlight its refined 39.5mm case and simplified dial, while some owners appreciate the reduced thickness and improved wearability compared to larger variants, with a lug-to-lug distance noted as potentially long for smaller wrists. The watch features a 68-hour power reserve and a bespoke L791.4 movement. However, the case thickness is a consistent point of discussion, with multiple sources citing 17mm, though some reviewers suggest thoughtful design makes it wear closer to 13.5-14mm. Owners are split on the dial's aesthetic, with some preferring previous configurations with gold subdial rings and concentric textures over the current flat matte dial and cut-off numbers. The leather strap is also noted as stiff and pinching.

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