02/25/2026
I acquired this Dufonte watch in 2021 as part of a small lot of watches that I got a great deal on at an antique store. But it needed some love–it had a broken pusher and a badly crazed crystal.
This watch has a 45 minute chronograph with 1/5 second accuracy. The outermost, red dial scale is a tachymeter. The Speidel Twist-O-Flex band includes an analog perpetual calendar, where you roll the months back or forth to find the month you’re currently in. This watch has a beautiful Landeron cal. 189 cam-switched movement, which was made between 1963 and ‘70.
The “T” in “T Swiss Made T” on the dial means the lume is tritium based, which is radioactive. Tritium has a half-life of only 12 years, so this watch isn’t dangerous. Tritium use in watches replaced the far more radioactive Radium, which has a half-life of 1,600 years. Tritium was common from the early 1960s to the late 1990s, when it was replaced by non-radioactive materials.
In 1873, Charles Hahn & Cie was established in Le Landeron, Switzerland, and initially produced high-quality watch movements. Landeron acquired Anatole Breitling’s patents in 1924, becoming a key supplier for column-wheel chronographs. Landeron was a founding member of Ebauches SA in 1926. In 1937, Landeron developed the Caliber 47, the first cam-switched, three-pusher chronograph, which was refined into the iconic two-pusher Landeron 48. In the 1940s to the ‘60s, the Landeron 48, 148, and 248 became the "everyman" chronograph movement, used by brands like Heuer, Baume & Mercier, and Chronographe Suisse. Landeron produced the first Swiss electric movement, Cal. 4750, in the 1960s. The Landeron factory closed in the early 1980s. The "Landeron" brand name was later acquired in 2015 by Depa Luxury Distribution, who now operates as Landeron Swiss Movements.
In 1923, Lucien Piccard was founded in Laussane, Switzerland, producing high-quality handcrafted watches that were often worn by famous people, like Frank Sinatra. While rooted in Swiss heritage, the brand was managed by Abraham Blumstein, a New York-based jeweler, starting in 1931. During the 1950s to the ‘70s, Lucien Piccard became famous for utilizing gold and precious stones, and competed with major luxury houses. LP was considered for NASA missions in the 1960s. In 1966, LP introduced the Dufonte sub-brand. The company faced financial difficulties, and filed for Chapter 11 in 2010. Swiss Watch International Group (SWI Group) acquired LP in 2011, and currently uses the LP brand name on affordable fashion watches.