Side by side

Serica Ref. 5303 Diving ChronometervsBoldr Odyssey Regatta

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
Odyssey Regatta
BoldrOdyssey Regatta
MSRP $1,499

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Odyssey Regatta45.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Odyssey Regatta40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Odyssey Regatta500m
MSRP
Ref. 5303 Diving Chronometer$1,768
Odyssey Regatta$1,499

Full specifications

Case

5 specs
Diameter
39mm
45.5mm
Thickness
12.2mm
16mm
Lug-to-Lug
46.5mm
52mm
Lug Width
20mm
22mm
Water Resistance
300m
500m

Crystal & Dial

1 specs
Dial Color
Enamel Black
Regatta Admiral Blue

Movement

3 specs
Caliber
M100 COSC
ETA Valjoux 7750
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$1,499

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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 Odyssey Regatta

The Boldr Odyssey Regatta is noted for its robust functionality and utilitarian design, powered by a Valjoux 7750 Elaboré movement. It features a tachymeter bezel graduated in knots and offers 500m water resistance. While its 45.5mm diameter, 18.2mm thickness, and 245g weight make it a substantial timepiece, it wears better than its dimensions might suggest. Overall, owners and reviewers highlight the Boldr Odyssey Regatta's workhorse movement and functional tool-watch capabilities.

From video reviewers

500m water resistance is a consistently praised feature. The watch's significant weight and large case size were noted as drawbacks by multiple reviewers. Reviewers disagreed on whether the bezel's 15-minute markings were redundant given the regatta complication.

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