Side by side

Serica Ref. 5303 Diving ChronometervsHorage Autark Tourbillon GMT

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

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
Autark Tourbillon GMT
HorageAutark Tourbillon GMT
MSRP $20,150

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Autark Tourbillon GMT39.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Autark Tourbillon GMT72h
Water Resistance
Ref. 5303 Diving Chronometer300m
Autark Tourbillon GMT100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Autark Tourbillon GMT$20,150

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
39mm
39.5mm
Thickness
12.2mm
8.9mm
Lug-to-Lug
46.5mm
48.3mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Yes
No
Dial Color
Enamel Black
Meteorite

Movement

3 specs
Caliber
M100 COSC
Horage K-TMR
Power Reserve
42h
72h
Complications
COSC
Tourbillon, GMT

Pricing

1 specs
MSRP
$1,768
$20,150

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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.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

Horage Autark Tourbillon GMT

Owners widely praise the Horage Autark Tourbillon GMT for its Swiss-made tourbillon, platinum micro-rotor, and super-thin 9mm titanium case design, noting little less than premium feel in case and movement finishing. The dial features a sub-seconds, date, and power reserve indicator, powered by an in-house movement with a 60-hour reserve. Some find the sub-dial illegible and hour hands difficult to read quickly, while others note the stepped bezel is not to their taste and the micro-rotor can be loud. The bracelet's lack of taper is also flagged as a drawback. On balance, owners rate the Horage Autark Tourbillon GMT highly for its premium finishing and innovative technical features at its price point.

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