The groundbreaking Blancpain Ladybird returns 70 years later, its pioneering spirit recast for today
When the Blancpain Ladybird was introduced in 1956, it made headlines with the smallest mechanical movement of its kind, the R55, measuring just 11.85mm in diameter. For context, it is no larger than a fingertip. Today, it still holds the record as the smallest round, mass-produced mechanical movement.
Even more remarkable was that its tiny dimensions did not come at the expense of performance. Beating at 3Hz, it offered more than 40 hours of power reserve and was protected by an anti-shock system—a feature rarely found in movements this small because of the difficulty of incorporating one.
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Above The original Blancpain Ladybird from 1956
Behind this extraordinary achievement was Betty Fiechter, the first woman to lead a Swiss watch manufacture. She joined Blancpain as an apprentice in 1912 and, following the death of Frédéric-Émile Blancpain, the last member of the Blancpain family to lead the company, became its co-owner in 1932.
Despite the Great Depression and the death of her business partner André Léal during World War II, Fiechter successfully steered Blancpain into the modern era, leaving an enduring legacy that included such timepieces as the iconic Fifty Fathoms and, of course, the Ladybird.
Fiechter’s contribution was immense. She preserved Blancpain through successive crises, championed mechanical watches for women and remained committed to mechanical watchmaking—a philosophy the manufacture maintains to this day, having never produced a quartz watch.
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Above Blancpain Ladybird Lady B in 18k red gold and steel
Blancpain is now honouring Fiechter’s legacy with a contemporary interpretation of the original Ladybird, 70 years after its debut. As elegant as its predecessor, with a softly rounded, pebble-like case, the Ladybird Lady B is far more than a pretty face.
The case has a volume of just 2.9 cubic centimetres and is composed of two sections, upper and lower. Yet the division between them is effectively hidden through a careful interplay of volumes, light and polished surfaces.

Above Calibre 615, one of the smallest automatic mechanical movements
Lady B‘s architecture allows it to accommodate the manufacture calibre 615. Measuring 15.7mm in diameter and 3.9mm thick, the movement comprises 180 components and 29 rubies. It offers 38 hours of power reserve, beats at 3Hz and uses a silicon balance spring for greater resistance to magnetism. The plates are finished with Côtes de Genève.
Available in stainless steel or 18k red gold, the Ladybird keeps its dial deliberately restrained, with two hands and discreet hour markers.
There are no conventional lugs. Instead, the strap threads directly into an opening in the case, with the inner surface micro-blasted for smooth passage of the leather. The double-loop strap is offered in white, light beige, dark beige, burgundy, classic blue and fuchsia purple.
A women’s watch need not be defined only by its exterior. That idea belongs to another era. If the new Lady B demonstrates anything, it is that technical ambition and elegance are not competing qualities. Seventy years after Blancpain first proved the point, its smallest watch is once again making a rather large statement.
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