Side by side

Serica Ref. 5303 Diving ChronometervsNodus Sector II Dive 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
Sector II Dive GMT
NodusSector II Dive GMT
MSRP $575

At a glance

12 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Sector II Dive GMT38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Sector II Dive GMT41h
Water Resistance
Ref. 5303 Diving Chronometer300m
Sector II Dive GMT100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Sector II Dive GMT$575

Full specifications

Case

4 specs
Diameter
39mm
38mm
Thickness
12.2mm
11.9mm
Lug-to-Lug
46.5mm
47mm
Water Resistance
300m
100m

Crystal & Dial

3 specs
Crystal Shape
Flat
Box
Dial Color
Enamel Black
Lume
Super-LumiNova
Swiss Super-LumiNova® BGW9 Grade A

Movement

4 specs
Caliber
M100 COSC
TMI NH34 (GMT)
Power Reserve
42h
41h
Jewels
25
24
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$575

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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.

Nodus Sector II Dive GMT

Owners widely praise the Nodus Sector II Dive GMT for its solid build, bracelet, and fit and finish for the price, with reviewers noting its well-executed finishing featuring alternating brushed and polished surfaces. The regulated Seiko NH34 movement is reported to run at +5 seconds per day. Some owners desire a Miyota 9075 movement and lume on the GMT hand, and a reviewer finds the 120-click dive bezel less ideal for GMT functions than a bi-directional 48-click GMT bezel, while the dial's dense Arabic numerals can be overwhelming for some despite good legibility. On balance, owners and reviewers rate the Nodus Sector II Dive GMT highly for its attractive design and build quality at its price point.

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