If you spend any time browsing vintage watch forums or admiring mid-century timepieces, you will quickly notice a fascinating recurring word printed across the dials of 1950s and 1960s Enicar watches: Ultrasonic.
A modern enthusiast might assume "Ultrasonic" is a specific model name—something akin to a Rolex Submariner or an Omega Seamaster. Others might guess it refers to some sort of futuristic, high-frequency mechanical movement. The reality, however, is far more interesting and speaks volumes about Enicar’s unique approach to watch manufacturing.
"Ultrasonic" wasn't a watch model at all; it was a badge of laboratory innovation. It signified a revolutionary, high-tech manufacturing process that Enicar pioneered to solve one of the oldest, most frustrating problems in mechanical watchmaking: oil degradation.
The Silent Enemy of Mechanical Watches
To understand why Enicar’s Ultrasonic breakthrough was such a massive deal, we have to look under the hood of a traditional mechanical watch. A watch movement is a complex ecosystem of tiny gears, pinions, and synthetic jewels. For these parts to move smoothly without grinding themselves to dust, they require precise lubrication.
Historically, the biggest headache for watch brands was that even the finest factory oils would inevitably "creep" or spread away from the jewels. Worse yet, microscopic dust particles, metal shavings, and chemical residues left over from the traditional manufacturing and assembly processes would mix with the oil. Over time, this mixture would oxidize and turn into a thick, gummy paste. The watch would lose accuracy, slow down, and eventually stop ticking altogether, forcing the owner to pay for an expensive service.
Sound Waves at the Service of Horology
In 1953, determined to give their watches a competitive edge in reliability, Enicar partnered with the Federal Institute of Physics in Zürich. Together, they designed a state-of-the-art laboratory facility at Enicar’s factory in Oensingen, Switzerland.
Their solution was radical for the 1950s: using high-frequency ultrasonic sound waves to clean every single movement component before final assembly.
The raw movement parts were submerged in specialized chemical cleaning baths. Ultrasonic transmitters then blasted the liquid with sound waves, causing millions of microscopic bubbles to form and violently collapse against the metal surfaces. This process, known as cavitation, literally blasted away every microscopic trace of grease, debris, and production residue that traditional hand-cleaning methods missed.
Once entirely stripped of microscopic contaminants, the parts were treated with a brand-new, proprietary chemical coating that acted as an invisible barrier. This treatment bound to the metal and chemically prevented the lubricating oils from spreading away from the pivot points.
The Three-Year Guarantee
Enicar was so incredibly confident in this new laboratory process that they turned it into the cornerstone of their mid-century marketing. They proudly boasted to consumers that an Enicar Ultrasonic movement was so chemically clean that it could easily run for three full years without needing a single drop of fresh oil or service—an unheard-of claim at the time.
To prove the point to the world, Enicar launched a series of wild publicity stunts. Most famously, in 1957, they attached an Enicar Ultrasonic watch to the rudder of the Mayflower II—a historical replica ship that sailed across the Atlantic Ocean from England to New York. Despite being submerged in corrosive saltwater, constantly slammed by waves, and subjected to massive temperature changes for over 50 days, the watch stepped off the boat in New York ticking perfectly.
Spotting an Ultrasonic Today
For modern vintage collectors, an Enicar text-stamped "Ultrasonic" represents a beautiful era of optimistic, space-age Swiss engineering.
Visually, these watches are a playground for design lovers. Because the Ultrasonic process was applied across multiple lines, you can find the text on everything from elegant, ultra-slim 1950s dress watches with gold-plated cases to robust, stainless-steel sports models. They frequently feature stunning dial architecture, including sharp dauphine hands, textured crosshair patterns, and beautifully sculpted lugs that hug the wrist perfectly.
When you look at the dial of a vintage Ultrasonic, you aren't just looking at a retro aesthetic. You are looking at a permanent badge of mid-century innovation—a time when a clever Swiss factory used the power of sound waves to build a fundamentally better watch.