Side by side

Serica Ref. 5303 Diving ChronometervsBaltic Hermétique Summer

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
Hermétique Summer
BalticHermétique Summer
MSRP $594

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Hermétique Summer37mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Hermétique Summer42h
Water Resistance
Ref. 5303 Diving Chronometer300m
Hermétique Summer150m
MSRP
Ref. 5303 Diving Chronometer$1,768
Hermétique Summer$594

Full specifications

Case

5 specs
Category
Diver
Dress
Diameter
39mm
37mm
Thickness
12.2mm
10.8mm
Lug-to-Lug
46.5mm
46mm
Water Resistance
300m
150m

Crystal & Dial

2 specs
Dial Color
Enamel Black
Orange
Lume
Super-LumiNova
BGW9

Movement

2 specs
Caliber
M100 COSC
Miyota 9039
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$594

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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.

Baltic Hermétique Summer

Reviewers highlight the Baltic Hermétique Summer's compact 37mm brushed case with a polished bezel and 150 meters of water resistance. The watch features glossy dials in bright colors with raised BGW9 Super-LumiNova indices that emit a strong blue glow, and it comes with color-matched FKM rubber straps or Baltic bracelets. The Miyota 9039 movement supports hacking and hand-winding. However, the recessed crown can be difficult to manipulate if fingernails are not long enough, and the movement has a stated accuracy of -10/+30 seconds per day. Overall, reviewers praise the Baltic Hermétique Summer for its well-balanced, colorful dials and strong lume at an affordable price point.

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