Side by side

Jack Mason Strat-o-timer GMTvsZelos Comet 39

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

Strat-o-timer GMT
Jack MasonStrat-o-timer GMT
MSRP $1,149
Comet 39
ZelosComet 39
MSRP $2,499
What people say

Owners + reviewers, side by side

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

Jack Mason Strat-o-timer GMT

Owners and reviewers widely praise the Jack Mason Strat-o-timer GMT for its exceptional value and traveler GMT functionality powered by the Miyota 9075 movement. Specific strengths highlighted include impressive fit and finish, screw-in bracelet pins, on-the-fly adjustment, sapphire crystal front and back, a screw-down crown, and a lumed bezel. The 7-link bracelet, with its micro-adjust buckle offering 9 points of adjustment, is frequently cited as a standout feature, with some owners comparing it favorably to much more expensive watches. Some reviewers note "chubby" hour markers and a potentially plastic bezel insert, though others state it is sapphire. The watch is praised for its comfortable 42mm case and vintage aesthetic. Overall, owners rate the Jack Mason Strat-o-timer GMT highly for its outstanding value and well-executed traveler GMT complication.

Zelos Comet 39

Owners widely praise the Zelos Comet 39 for its wearable 39mm size, thin profile under 10mm thanks to its manual-wind Sellita SW215 movement, and its captivating dial with a deep starburst effect. The winding action is described as a joy, and the watch is considered a stunner for its price, blending modern and vintage aesthetics. Some owners note frustration with Zelos's limited production runs leading to quick sell-outs. One owner found the logo childlike, while another experienced strap-rubbing issues with the short lugs, which were resolved with a Milanese bracelet. Overall, owners and reviewers rate the Zelos Comet 39 highly for its excellent value and striking dial design.

At a glance

12 of 29 specs differ
Diameter
Strat-o-timer GMT42mm
Comet 3939mm
Power Reserve
Strat-o-timer GMT42h
Comet 3940h
Water Resistance
Strat-o-timer GMT200m
Comet 3950m
MSRP
Strat-o-timer GMT$1,149
Comet 39$2,499

Full specifications

Case

6 specs
Category
Dress
Diameter
42mm
39mm
Thickness
13.2mm
7.6mm
Lug-to-Lug
49mm
39mm
Lug Width
22mm
20mm
Water Resistance
200m
50m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Dial Color
Tantalum LE

Movement

3 specs
Caliber
Miyota 9075
ETA/Peseux 7001
Type
Automatic
Manual
Power Reserve
42h
40h

Pricing

1 specs
MSRP
$1,149
$2,499
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