Side by side

Serica Ref. 5303 Diving ChronometervsGlycine Combat Sub Sport

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
Combat Sub Sport
GlycineCombat Sub Sport
MSRP $1,650

At a glance

17 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Combat Sub Sport42mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Combat Sub Sport38h
Water Resistance
Ref. 5303 Diving Chronometer300m
Combat Sub Sport200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Combat Sub Sport$1,650

Full specifications

Case

7 specs
Diameter
39mm
42mm
Thickness
12.2mm
10.45mm
Lug-to-Lug
46.5mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Water Resistance
300m
200m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Yes
Dial Color
Enamel Black
Indices
Applied
Lume
Super-LumiNova
Luminous

Movement

4 specs
Caliber
M100 COSC
SW200-1
Power Reserve
42h
38h
Jewels
25
26
Complications
COSC
Date

Pricing

1 specs
MSRP
$1,768
$1,650

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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.

Glycine Combat Sub Sport

Owners widely praise the Glycine Combat Sub Sport for its exceptional value, thin profile, and solid build quality, often noting its finishing and wearability as superior for its price point. Reviewers consistently flag its slim case, with measurements around 10.4mm to 10.8mm, and appreciate its non-homage design and comfortable lug curvature. Accuracy figures vary, with one owner reporting only 2 seconds per day loss, while another notes their Sellita SW200 movement runs at +6 to +9 seconds per day. Some owners report inconsistent power reserve not reaching the advertised 42 hours and find the lume sub-par for nighttime legibility. A few also mention sharp bracelet edges and a potentially short bracelet for larger wrists, and one owner dislikes the "COMBAT" text on the dial. On balance, owners and reviewers rate the Glycine Combat Sub Sport highly for its impressive thinness and value as a Swiss automatic diver.

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