Bernhard Lederer and the Questions Behind the Watch

On a classroom screen at the Horological Society of New York, a diagram picked apart the workings of an escapement. Entry and exit pallet stones, locking faces and impulse planes each had a label. At the workbench, a green mat held fine tools and a divided metal tray. The photographs from October 15, 2026, bring the evening down to that scale: tools, contact surfaces and the small parts on which timekeeping depends.

The occasion was Horology 104, a fundraising class taught by Bernhard Lederer and devoted to the lever escapement.1 It was an opportunity to study a familiar mechanism with a watchmaker who had spent years searching for other ways to make a watch keep time.

The most surprising part of the evening, in the account shared with the Society, was the story Lederer told about getting there: the discouragement surrounding his early ambition, and his determination to continue. The career behind the man teaching the class had begun with much less encouragement than his later reputation might suggest.

Lederer was born in Kornwestheim, Germany, in 1958. An inherited pocket watch drew him toward the craft. He turned to books to understand it, and encountered an idea that held his attention: different escapements had different sounds. With practice, a listener could recognize something of a watch’s construction from its ticking. The fascination that would eventually occupy decades of his working life began with the question of what made those sounds different.2

Choosing watchmaking as a profession meant pursuing that curiosity during the quartz crisis. In a 2022 interview with MONOCHROME, Lederer recalled his parents’ disappointment and their attempts to persuade him to choose a more secure occupation. He trained at the Abeler watch museum in Wuppertal, where historic watches and clocks provided his education.3

Completing the apprenticeship did not produce an easy opening. Lederer recalled sending 102 job applications. Only three replies came back, all rejections. He began taking repair and restoration work from auction houses, antiquarians and private clients. Work that employers had not offered him became work he found for himself.3

The range of his own creations widened over the years. His master’s diploma piece was an elaborate calendar clock; later work explored unconventional time displays and tourbillon constructions. He joined the early circle of independent makers around the Académie Horlogère des Créateurs Indépendants, or AHCI. In 2000, he moved to Switzerland and established BLU.2,4,12

That history gave the conversation in New York another dimension. The persistence was still visible in the way Lederer approached a problem. In the account shared with the Society, he described a preference for colleagues who bring questions. The lesson was that becoming too comfortable with answers could let the habit of thinking grow rusty.

The idea had a practical counterpart in the subject of the class. Every mechanical watch must control the release of its stored energy. The escapement performs that task while supplying impulses to keep the balance oscillating. At the contact surfaces enlarged on the classroom screen, the work of sustaining a regular rhythm becomes a problem of geometry, friction and precisely timed release.8

The Swiss lever has endured because it handles that work dependably. It tolerates the disturbances of everyday wear and suits established methods of production and servicing. Its traditional sliding contacts also consume energy through friction and require lubrication. Those trade-offs help explain why a mechanism so successful still gives watchmakers something to investigate.8,9

The evening offered a glimpse of how Lederer pursued that investigation: an approach concerned with finding the cause of a difficulty and reconsidering the solution itself. Learning how the designs had evolved made the technical achievement easier to connect to the person explaining it.

Lederer’s Central Impulse Chronometer carries that inquiry into a different arrangement of power. It builds on a line of experimentation associated with Abraham-Louis Breguet’s natural escapement and George Daniels’ independent double-wheel escapement.10 There are two independent power paths, each with its own barrel, gear train and escape wheel. The wheels give the balance direct impulses in alternating directions. Two remontoirs, small energy stores replenished periodically, help steady the power reaching the escapement.11

The description sounds orderly. Getting it to work in a wristwatch required years of development. Among Lederer’s changes was geometry that allowed the escapement to start itself, addressing a limitation of Daniels’ design. In a March 2026 interview with Revolution, he described work on the escapement stretching from 2013 to 2021, fitted around other work that paid the bills.7

Even a mechanism designed to improve consistency could introduce a problem of its own. In that interview, Lederer explained that his remontoir had not delivered the steady energy he expected from the technical literature. He examined the construction in detail, traced the difficulty to friction in the release and changed the arrangement. An accepted explanation had given him a starting point. Observing the mechanism showed him where more work was needed.7

The results earned recognition: the Central Impulse Chronometer won the Innovation Prize at the Grand Prix d’Horlogerie de Genève in 2021, followed by the Chronometry Prize for his 3 Times Certified Observatory Chronometer in 2024.5,6 Heard alongside the account of those early rejections, the awards mark the distance Lederer had travelled.

That was the encounter’s broader lesson about independent watchmaking. The watchmaker’s personal history and way of thinking gave the mechanism a fuller story. It is a perspective worth bringing back to the Horological Society of Pittsburgh: close study of a watch can also lead to the experiences and decisions of the person who made it.

One detail from the evening keeps that story open. The account of the class included a teaser for a forthcoming 40th-anniversary piece. A photograph from the evening shows a pouch marked with a coffee bean and the label Experiment 0.17. The watch’s design remained unrevealed. The label offered a number, but no explanation.

The pouch carried another message: “Not every chapter ends when the first answer appears. Some are worth revisiting.”

After an evening spent learning how Lederer thinks, there was still the coffee bean to work out.