Name: Rado True Thinline Automatic R27071172
Brand: Rado
SKU: R27071172

The True Thinline Automatic pushes Rado's ceramic mastery into ultra-thin territory, delivering a 5mm case that disappears under a shirt cuff. Full high-tech ceramic on both case and bracelet means it will outlast any steel equivalent in scratch resistance. This is a serious dress watch for collectors who want something genuinely different from the usual suspects.

What it is

Rado introduced the True Thinline Automatic in 2017 as a refinement of the broader True line, applying the brand's decades of ceramic expertise to a format dominated by traditional metal cases. The 40mm reference combines a monolithic high-tech ceramic case and integrated bracelet with a movement thin enough to keep the overall profile at 5mm. Rado's ceramic is plasma-treated and fired at extreme temperatures, producing hardness that approaches sapphire without the brittleness of glass.

The R27071172 sits at the intersection of two things Rado does better than almost anyone: ultra-thin construction and scratch-proof ceramic finishing.

Buying notes

Ceramic is hard but not indestructible. It resists scratches far better than steel, but a sharp impact on a corner or a hard drop can chip or crack the case. The integrated ceramic bracelet is comfortable but non-adjustable through traditional means, so fit needs to be confirmed before purchase.

The 30m water resistance is a dress-only specification and should be treated as such: no swimming, no showers, no rain exposure beyond the incidental. Finding a used example in truly pristine condition is possible given the scratch resistance, but inspect the bracelet links carefully because chips near the clasp area are not rare. Replacement bracelet links can be sourced through Rado but at meaningful cost.

Market read

The R27071172 trades at a significant discount to its retail price on the secondary market, which makes it an honest value for what it delivers. Comparable ultra-thin ceramic construction in a Swiss watch would cost considerably more from most other manufacturers. Demand is steady but not speculative, so there is no rush premium and no artificial scarcity to navigate.

Service expectations

The ETA 2671 is a reliable, widely-serviced automatic with a proven service record. Any watchmaker comfortable with ETA movements can service this caliber, and parts availability is good. Recommended service interval is every 5 to 7 years, and Rado's own service centers can handle the ceramic case work if the bracelet or case ever needs attention beyond movement service.

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Mass-produced#1 in family

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Mid-tier supplier movement · caliber ETA 2671: Swiss automatic, 28,800bph, 38h PR, 17j; exceptionally thin at 2.5mm; used in Rado True Thinline; ladys automatic, micro-rotor bidirectional winding · 38h power reserve

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The True Thinline Automatic must measure its stated sub-5mm thickness; any thicker example has a different or incorrect movement installed.

Known issues in the market

The ETA 2671 micro-rotor is correct for this reference; any rotor other than a micro-rotor through the caseback indicates a movement swap.
Sub-5mm case thickness is the design specification; measure with calipers if in doubt.

Area	What to check	What is correct	Red flag
case	Case thickness measurement	Sub-5mm total case thickness as stated by Rado	Thickness exceeds specification; wrong or non-genuine movement installed
movement	ETA 2671 micro-rotor architecture through caseback	Micro-rotor visible through caseback; consistent with ETA 2671	Full-size rotor or non-micro-rotor architecture; movement swap
case	Ceramic case surface condition	Scratch-free ceramic surfaces	Scratched surfaces; non-genuine or incorrect case material
caseback	Rado serial and reference engravings	Rado name, reference, and serial correctly engraved	Missing or incorrect engravings; non-genuine caseback

Common legitimate replacements

Crystal; sapphire standard.
Crown; Rado OEM only.

Expert resources: Rado authorized service; Rado.com True Thinline documentation.

Authentication guide

Last reviewed June 2026

The True Thinline is defined by its ultra-thin solid ceramic case. Weight is the primary field test; ceramic at this volume is measurably lighter than steel equivalents.

Known reproduction risks

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LOW

Not a common counterfeit target. The ceramic monocoque case construction is expensive and technically demanding.

Replicas use ceramic-coated metal; the resulting piece is heavier and the coating chips at lug edges under normal use
Dial on replicas shows coarser text; the "True Thinline" designation is often misaligned or in incorrect font weight

Hold in one hand and a comparably sized steel dress watch in the other. Genuine True Thinline will feel noticeably lighter.

Dial variants by era

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Era	Description	Identifiers
2015 to present	Monocoque-style high-tech ceramic case in matte or polished finish. Ultra-thin profile (under 6mm). No date on most references. Minimalist dial with slim applied markers.	Case thickness noticeably thinner than any comparably sized steel dress watch Matte ceramic variants have a distinctly flat, non-reflective surface that no steel finishing replicates Ceramic bracelet links have no tool marks at screw holes; they are machined to tight tolerances

Service part flags

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Case

Original: Monobloc ceramic construction; the case and integrated lugs are one piece.

Replacement tells

Any visible seam or join between lug and case body is wrong
Polished finish on a matte-spec variant suggests refinishing, which removes material and can affect fit of crystal or caseback

Crystal

Original: Flat sapphire crystal, AR-coated. Sits flush with case edge.

Replacement tells

Mineral glass replacement is visibly less sharp at edges and will scratch under a light key test
Crystal sitting proud of the case edge suggests incorrect thickness

Case back markings

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2015 to present

Ceramic caseback with "RADO True Thinline" and reference/serial numbers
"Swiss Made" and water resistance rating (typically 30M)
Some variants use a screw-in caseback; others are snap-fit into the ceramic body

Movement tells

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Movement is ETA 2892-A2 or equivalent slim automatic; correct for the case thickness constraint.
The True Thinline uses a thin rotor; a standard-height rotor will not fit and is a clear sign of an incorrect movement swap.
Winding efficiency is lower than on a standard rotor; expect longer full-wind time from a flat wrist position.

Sources: Rado True Thinline product page.