Side by side

Serica Ref. 5303 Diving ChronometervsStudio Underd0g Steffany Blue

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
Steffany Blue
Studio Underd0gSteffany Blue
MSRP $800

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Steffany Blue39.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Steffany Blue40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Steffany Blue
MSRP
Ref. 5303 Diving Chronometer$1,768
Steffany Blue$800

Full specifications

Case

6 specs
Category
Diver
Casual
Diameter
39mm
39.5mm
Thickness
12.2mm
Lug-to-Lug
46.5mm
Lug Width
20mm
Water Resistance
300m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Blue
Lume
Super-LumiNova
None

Movement

4 specs
Caliber
M100 COSC
Type
Automatic
Manual
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$800

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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.

Studio Underd0g Steffany Blue

Owners widely praise the Studio Underd0g Steffany Blue for its beautiful multilayer dial with a floating effect and vivid Super-LumiNova, with one owner finding it smaller and more beautiful than expected. The 37mm case wears nicely, though some find it slightly small for larger wrists. One owner notes the power reserve can fall short of the advertised 48 hours, sometimes lasting only about a day. Overall, owners rate the Studio Underd0g Steffany Blue highly for its striking dial and luminous display.

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