Side by side

Serica Ref. 5303 Diving ChronometervsBoldr Safari

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
Safari
BoldrSafari
MSRP $449

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Safari40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Safari40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Safari200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Safari$449

Full specifications

Case

5 specs
Category
Diver
Tool
Diameter
39mm
40mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
46mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
Enamel Black
Silver Fox

Movement

3 specs
Caliber
M100 COSC
Seiko NH38A
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$449

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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 Safari

Owners widely praise the Boldr Safari for its attractive dials, robust build with 200 meters of water resistance, and reliable Seiko movements. The California dial design is a frequent highlight, as is the strong lume. Some owners note the GMT variant offers full GMT functionality, while others point out the movement's date-only nature on certain models leads to a vestigial crown position. The animal artwork on the display caseback is a point of contention, with some finding it detracts from the view of the movement. Overall, owners rate the Boldr Safari highly for its value and distinctive design elements.

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