The Wristwatch Field Guide

Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K)

R27092622

The Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K) is a current-production dress watch with a blue high-tech ceramic case. It measures 39.0 mm across, 5 mm thick, 80 g, and is water resistant to 30 m. Inside is the R420 quartz movement. Complications: Time only. Priced from $2,400. Brand origin: Switzerland.

Titanium and ceramic dress watchesCeramicBlueUnder $5,000
Reference
R27092622
Type
Dress
Price
$2,400
Case diameter
39.0 mm
Thickness
5 mm
Lug-to-lug
–
Water resistance
30 m
Weight
80 g (with bracelet)
Origin
Switzerland
Movement
Quartz
Caliber
R420
Power reserve
–
Complications
Time only
Material
Ceramic
Grade / type
High-tech ceramic
Colour
Blue
Hardness
–
Construction
Monobloc
Surface treatment
–
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Ultramarine blue high-tech ceramic bracelet with a titanium clasp
Matching bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Ultramarine blue
Lume
–
Availability
Offered
Status
Current (limited edition of 999)
Medium confidence Verified Jul 2026 Source: Rado US (maker) Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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RadoTrue Square Automatic (black)$2,45038.0 mm9.6 mm thick117 gDress
RadoTrue Square Automatic (plasma)$2,45038.0 mm9.7 mm thickDress
RadoTrue Square Automatic (green)$2,45038.0 mm9.6 mm thickDress
RadoTrue Square Automatic Open Heart (rose)$2,95038.0 mm9.7 mm thick116 gDress

Frequently asked questions

What is the case material of the Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K)?

The Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K) has a blue high-tech ceramic case with a titanium caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K)?

It is 39.0 mm in diameter, 5 mm thick, and water resistant to 30 m.

How much does the Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K) weigh?

About 80 g (w/ bracelet).

How much does the Rado True Round Thinline Les Couleurs Le Corbusier (spectacular ultramarine 4320K) cost, and is it available?

It is current-production and lists from $2,400.

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