The Ceramic 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.

Ceramic dress watchesBlue ceramicOn a ceramic braceletUnder $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
Ceramic
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
Ceramic 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.
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Frequently asked questions

What kind of ceramic is 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 type.

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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