Side by side

Serica Ref. 5303 Diving ChronometervsBaltic Aquascaphe GMT

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
Aquascaphe GMT
BalticAquascaphe GMT
MSRP $1,015

At a glance

9 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Aquascaphe GMT39mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Aquascaphe GMT42h
Water Resistance
Ref. 5303 Diving Chronometer300m
Aquascaphe GMT100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Aquascaphe GMT$1,015

Full specifications

Case

4 specs
Category
Diver
GMT
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
47mm
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Enamel Black
Green
Lume
Super-LumiNova
SuperLuminova

Movement

2 specs
Caliber
M100 COSC
SOPROD C125 GMT
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$1,015

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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 Aquascaphe GMT

The Baltic Aquascaphe GMT is widely praised for its compact 39mm case size, comfortable thickness, and refined, timeless design with a crisp, well-executed dial and sapphire bezel insert. Owners and reviewers alike highlight its excellent value and slick appearance, noting the vintage-inspired aesthetic with brushed surfaces and painted indexes. Some reviewers consider the lume adequate but not exceptionally bright, and the case finishing, while fitting the tool-watch ethos, lacks embellishments like polished bevels. The Soprod C125 movement features a 42-hour power reserve and a non-independent hour hand setting, though the 24-click bezel is seen as practical. Certain bezel color options are noted as potentially difficult to pair with outfits. Overall, owners and reviewers rate the Baltic Aquascaphe GMT highly for its exceptional value and refined, compact design.

From video reviewers

The Baltic Aquascaphe GMT features a Swiss Soprod C125 movement, a notable upgrade for the brand. Its attractive design fits within the popular $1000 price point. A significant drawback is the lack of a quick-set date function, requiring manual adjustment.

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