Side by side

Serica Ref. 5303 Diving ChronometervsGlycine Airman Worldtimer GMT Dual Time

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

At a glance

19 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Airman Worldtimer GMT Dual Time40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Airman Worldtimer GMT Dual Time
Water Resistance
Ref. 5303 Diving Chronometer300m
Airman Worldtimer GMT Dual Time100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Airman Worldtimer GMT Dual Time$995

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
39mm
40mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
Finish
Brushed and polished
Water Resistance
300m
100m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Yes
Dial Color
Enamel Black
Ivory
Indices
Applied
Lume
Super-LumiNova
None

Movement

6 specs
Caliber
M100 COSC
RONDA 515.24H
Type
Automatic
Quartz
Beat Rate
28,800 vph
Power Reserve
42h
Jewels
25
1
Complications
COSC
GMT, Date, World Time

Pricing

1 specs
MSRP
$1,768
$995

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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 Airman Worldtimer GMT Dual Time

Owners widely praise the Glycine Airman Worldtimer GMT Dual Time for its comfortable 40mm size, attractive aesthetics, blue GMT hand, sapphire crystal with blue AR coating, and locking bezel. Some owners find it a significant improvement over previous Airman models, with one reporting good timekeeping. However, the dual 24-hour and GMT hands are noted by some as making local time setting less intuitive than a purist 24-hour dial. On balance, owners and reviewers appreciate the Glycine Airman Worldtimer GMT Dual Time for its comfortable wearability and classic design elements.

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