Side by side

Serica Ref. 5303 Diving ChronometervsOak & Oscar The Olmsted ExP-01

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
The Olmsted ExP-01
Oak & OscarThe Olmsted ExP-01
MSRP $1,775

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
The Olmsted ExP-0138mm
Power Reserve
Ref. 5303 Diving Chronometer42h
The Olmsted ExP-0142h
Water Resistance
Ref. 5303 Diving Chronometer300m
The Olmsted ExP-01100m
MSRP
Ref. 5303 Diving Chronometer$1,768
The Olmsted ExP-01$1,775

Full specifications

Case

6 specs
Category
Diver
Field
Diameter
39mm
38mm
Thickness
12.2mm
10.8mm
Lug-to-Lug
46.5mm
44.9mm
Material
Stainless Steel
316L Heat-treated Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

3 specs
Crystal Shape
Flat
Double-domed
AR Coating
Yes
Underside
Dial Color
Enamel Black
Black

Movement

3 specs
Caliber
M100 COSC
Sellita SW300
Beat Rate
28,800 vph
4 vph
Complications
COSC
GMT, Chronograph, Date

Pricing

1 specs
MSRP
$1,768
$1,775

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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.

Oak & Oscar The Olmsted ExP-01

Owners widely praise Oak & Oscar The Olmsted ExP-01 for its exceptional finishing, comfortable bracelet, and smooth movement. The dial designs are a frequent point of admiration, with specific appreciation for the white, navy, and gray variants, as well as the orange seconds hand. The watch is considered fairly priced at around $1.5k and is noted for its versatility and "soul." On balance, owners rate Oak & Oscar The Olmsted ExP-01 highly for its overall quality, design, and the brand's customer service.

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