Side by side

Serica Ref. 5303 Diving ChronometervsTissot Le Locle Open Heart

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
Le Locle Open Heart
TissotLe Locle Open Heart
MSRP $995

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Le Locle Open Heart39.3mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Le Locle Open Heart80h
Water Resistance
Ref. 5303 Diving Chronometer300m
Le Locle Open Heart30m
MSRP
Ref. 5303 Diving Chronometer$1,768
Le Locle Open Heart$995

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
39mm
39.3mm
Thickness
12.2mm
9.75mm
Lug-to-Lug
46.5mm
39.3mm
Lug Width
20mm
19mm
Water Resistance
300m
30m

Crystal & Dial

4 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Silver
Indices
Applied
Roman
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
11 1/2'''
Power Reserve
42h
80h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$995

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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.

Tissot Le Locle Open Heart

Owners widely praise the Tissot Le Locle Open Heart for its elegant aesthetic, featuring a guilloché dial and Roman numerals, and appreciate its practical 80-hour power reserve and Nivachron hairspring. The watch is also noted for offering dual bracelet and strap options, along with a see-through case back. However, one owner flags negative community feedback regarding the comfort of the synthetic leather strap. Overall, owners rate the Tissot Le Locle Open Heart highly for its attractive design and impressive technical specifications at its price point.

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