The Piaget Altiplano | family history
Piaget has held the record for the thinnest mechanical watch in the world at multiple points in its history, and the Altiplano is the platform that has broken those records. The Altiplano Ultimate Concept (2018) achieved 2mm total thickness: not a movement inside a case, but a movement that is the case. The production Altiplano Automatic 40 carries the Cal. 1200P at 2.35mm movement height. Thinness at this level is not a marketing specification; it is genuine engineering requiring proprietary tooling and significant investment in flat-spring development.
Piaget's flagship ultra-thin collection and the defining modern thin watch. The manual-wind cal. 9P (1.2 mm, 1957) established Piaget as a thin-movement specialist; the automatic cal. 1200P (2.35 mm, integrated into a 5.34 mm case) brought the record to automatic complications. Round cases in 38–43 mm in gold, now also in steel, with indices-only dials and the barest gesture toward decoration. The Altiplano is the reference point for any conversation about thin automatic dress watches.
1957–1980 · Piaget's ultra-thin movement development
Piaget's commitment to ultra-thin movements dates to the early 1950s, when the brand began developing movements specifically for embedding in jewelry and extremely thin cases. The 9P manual-wind caliber (1957) at 2mm thick was the first landmark: the thinnest manual-wind movement in the world at introduction. The 12P automatic caliber (1960) at 2.3mm extended the claim to self-winding movements. These calibers were supplied to other brands as well as used in Piaget's own references.
No references from this era in the catalog yet.
1980–2000 · The Altiplano name and modern dress watch line
Piaget formalized the Altiplano as a named family to consolidate the thin dress watch production under a coherent identity. Through the 1980s and 1990s the line ran various ultra-thin calibers in 34mm and 38mm cases. The Altiplano aesthetic is round, minimal, and unadorned: the point is the case height, not the dial complexity.
No references from this era in the catalog yet.
2000–present · The 1200P, the Ultra Thin, and the Ultimate Concept
The Cal. 1200P (2010) set a production automatic record at 2.35mm movement height. The Altiplano Ultra Thin (2014) at 5.34mm total case height was another production record. The Altiplano Ultimate Concept (2018) achieved 2mm total thickness by integrating the movement and the caseback into a single plate: the sapphire crystal is the front, the titanium plate is simultaneously the back of the case and the movement baseplate. The current production Altiplano Automatic 40 and Altiplano Date are the catalog references for the everyday thin dress watch.
How to read this family
Three honest questions for any Altiplano buyer:
- Is an ultra-thin watch a practical daily-wear choice? Ultra-thin movements have less space for shock-absorbing architecture and power reserve than standard-height movements. The Cal. 1200P has a 44-hour power reserve, which is acceptable for daily wear. Thin movements are more sensitive to servicing quality and less tolerant of rough handling than a robust field-watch caliber. For a desk-job buyer who is gentle with their watch, an Altiplano is a reasonable daily choice. For a buyer who does physical work or frequently knocks their watch, the thin case is not well-suited.
- Altiplano or Jaeger-LeCoultre Reverso for a thin dress watch? The Reverso is a rectangular flip-case watch with a different identity: its thinness is incidental to its flip-case architecture. The Altiplano is a round dress watch whose entire purpose is thinness. They are not substitutes for the same buyer; they serve different aesthetic preferences. If you want the thinnest round dress watch from a prestige Geneva manufacture, the Altiplano is the answer.
- Which Altiplano to buy: 38mm automatic or the Ultra Thin? The Altiplano Automatic 38 is the most practical: round case, automatic movement, date option. The Ultra Thin is a manual-wind piece at 5.34mm case height, thinner than the automatic at the cost of needing daily winding. Buy the automatic for daily wear; buy the Ultra Thin if maximum thinness is the specific goal.
Related families: Piaget Polo · Calatrava · Chopard L.U.C
References in this family
Which ref to buy
The Altiplano is the ultra-thin standard against which every thin watch is measured. Piaget's movement-making heritage traces to the 1950s and the 12P, the flattest self-winding caliber of its era. Every Altiplano is a referendum on thickness.
- 1Open
Altiplano 41mm Ultra-Thin -- the wearable expression of Piaget's thinness benchmark.
- The case for it:
- Cal. 1200P, automatic, 2.35mm thick movement, 5.34mm total case height. The Ultra-Thin at 41mm is the most compelling buy in the Altiplano range -- it wears remarkably on the wrist and the movement caliber is a genuine horological achievement. The dial finishing is characteristically Piaget: applied gold indices, clean chapter ring, nothing extraneous.
- Consider instead if:
- At 5.34mm the case requires careful handling. This is not a watch you can bang around. For rough daily wear, the Automatic 38mm is more forgiving.
- 2Open
Altiplano Ultimate Concept 910P -- the thinnest mechanical watch ever made; a collector's object.
- The case for it:
- Cal. 910P integrated with the caseback -- the movement IS the caseback. Total case height: 2mm. This is the extreme edge of what mechanical watchmaking can achieve. An object of study as much as a wristwatch. Production is tightly limited and pricing is substantial.
- Consider instead if:
- At 2mm the watch is fragile in a practical sense. This is a special-occasion piece for collectors who appreciate the engineering statement, not a daily wearer.
- 3Open
60th Anniversary -- historical edition with a direct connection to the original 1957 Altiplano.
- The case for it:
- Hand-wound, 40mm, limited production marking the 60th anniversary of the Altiplano line. The correct choice for buyers who care about provenance and the historical narrative alongside the watch itself.
- Consider instead if:
- The Ultra-Thin is the stronger ongoing production choice. The 60th Anniversary is a collector edition -- buy it for what it is, not as a substitute for the standard line.
- 4Open
Altiplano Automatic 38mm -- the most accessible and most practical configuration.
- The case for it:
- Cal. 1110P, automatic, 38mm, 6.4mm case height. The practical Altiplano -- less extreme than the Ultra-Thin but still genuinely slim. Easier to find at retail with some discount.
- Consider instead if:
- The 38mm automatic is the value entry, not the statement piece. If thinness is the thesis, spend the extra for the Ultra-Thin.
Rankings last reviewed 2026-06-06. Editorial perspective only. Not financial advice.