Side by side

Serica Ref. 5303 Diving ChronometervsBoldr Globetrotter 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
Globetrotter GMT
BoldrGlobetrotter GMT
MSRP $469

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Globetrotter GMT40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Globetrotter GMT40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Globetrotter GMT200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Globetrotter GMT$469

Full specifications

Case

5 specs
Category
Diver
GMT
Diameter
39mm
40mm
Thickness
12.2mm
12.7mm
Lug-to-Lug
46.5mm
48mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
Enamel Black
GMT Banff

Movement

3 specs
Caliber
M100 COSC
Seiko NH34 GMT
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$469

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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.

Boldr Globetrotter GMT

The Boldr Globetrotter GMT is praised for its legibility and finishing, featuring applied Super-LumiNova indices and sword hands on a matte black or sunburst blue dial. Reviewers highlight the ceramic bezel's sharp city markings and tight, smooth ratcheting action. The 44mm 316L stainless steel case exhibits a non-traditional design with radial and vertical brushing.

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