Side by side

Serica Ref. 5303 Diving ChronometervsHorage Supersede 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
Supersede GMT
HorageSupersede GMT
MSRP $7,270

At a glance

12 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Supersede GMT39.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Supersede GMT72h
Water Resistance
Ref. 5303 Diving Chronometer300m
Supersede GMT200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Supersede GMT$7,270

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39mm
39.5mm
Thickness
12.2mm
9.85mm
Lug-to-Lug
46.5mm
46.29mm
Lug Width
20mm
22mm
Water Resistance
300m
200m

Crystal & Dial

2 specs
AR Coating
Yes
No
Dial Color
Enamel Black
Black

Movement

3 specs
Caliber
M100 COSC
Horage K2
Power Reserve
42h
72h
Complications
COSC
GMT

Pricing

1 specs
MSRP
$1,768
$7,270

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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 Supersede GMT

The Horage Supersede GMT is widely praised for its innovative micro-rotor movement and impressive finishing. Owners and reviewers highlight its value as a true GMT sports watch, noting the compact 39.5mm case and 200m water resistance. The K2 movement offers a 72-hour power reserve, and updates include an optional platinum rotor, a luminous seconds hand tip, and a new micro-adjustable clasp. One potential hesitation for buyers is the inability to see the watch in person. Overall, owners and reviewers rate the Horage Supersede GMT highly for its innovative micro-rotor movement and excellent value.

From video reviewers

The Horage Supersede GMT features a unique case design that blends different styles. A notable strength is its in-house K2 micro-rotor movement. One weakness is the relatively average lume brightness.

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