Side by side

Serica Ref. 5303 Diving ChronometervsRZE Aspirare

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
Aspirare
RZEAspirare
MSRP $699

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Aspirare44mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Aspirare40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Aspirare200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Aspirare$699

Full specifications

Case

7 specs
Diameter
39mm
44mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
53mm
Lug Width
20mm
22mm
Material
Stainless Steel
Grade 5 Titanium
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down

Crystal & Dial

3 specs
AR Coating
Yes
Underside
Dial Color
Enamel Black
White
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
Miyota 9039
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$699

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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.

RZE Aspirare

The RZE Aspirare is widely praised for its exceptional value and build quality at $599, featuring a 44mm titanium case with UltraHex coating and a Miyota 9015 movement. Owners find the watch surprisingly comfortable, even on smaller wrists, and appreciate its modern, futuristic design and interchangeable bezel system. Some reviewers note the minute hand appears slightly short relative to the chapter ring, and the 53mm lug-to-lug may be challenging for smaller wrists. On balance, owners and reviewers rate the RZE Aspirare highly for its robust titanium construction and strong value proposition.

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