Freak [S Purple Enamel]: Ulysse Nardin’s Final Titanium Freak [S]

Ulysse Nardin closes the titanium Freak [S] chapter with a purple enamel edition limited to 50 pieces. Ref. 2513-500LE-7AE-PURP/0A.

The Matter at Hand

• Purple guilloché-flinqué enamel coats the rotating hour disc of reference 2513-500LE-7AE-PURP/0A, produced entirely in-house at Donzé Cadrans, Ulysse Nardin’s dedicated enamelling workshop.
• Limited to 50 pieces, this is the final Freak [S] in titanium to feature an enamel hour disc.
• Calibre UN-251 houses two oversized silicon oscillators and the Grinder® winding system, delivering a 72-hour power reserve.
• The 45 mm titanium case retains the Freak’s three defining principles: no dial, no hands, no crown.

Fifty examples close the titanium Freak [S] enamel chapter. Ulysse Nardin announced the Freak [S Purple Enamel] in November 2026, the year the maison marks both 180 years of watchmaking in Le Locle and a quarter-century since the original Freak overturned convention in 2001.

Origins of the Colour

Enamel has occupied Ulysse Nardin’s workshops for generations, yet its application to a movement component rather than a traditional dial surface remains rare. At Donzé Cadrans, the guilloché-flinqué technique is applied first, cutting a geometric pattern into the disc before the purple enamel layer is fired over it. The firing process locks colour into glass, producing depth that paint or lacquer cannot replicate and saturation that does not fade over decades on the wrist.

The Engine Beneath

Calibre UN-251 runs the entire carousel of the Freak [S]. Two silicon oscillators, each inclined at 20 degrees, feed their rates into the world’s smallest vertical differential, a 47-part assembly using six ceramic ball bearings to average their output. The Grinder® automatic winding system replenishes a 72-hour reserve. Time is set not by a crown but by releasing a safety lock at 6 o’clock and turning the bidirectional bezel, a convention the Freak has maintained since its first edition, presented at Watches and Wonders press rounds over the years.

On the Wrist

At 45 mm in grade 5 titanium, the Freak [S] wears lighter than its diameter suggests. The purple calfskin leather strap reinforces the enamel’s chromatic statement without adding weight. For collectors across the Gulf considering the edition, the absence of crown and pushers creates an unusually clean profile against the cuff. With 50 pieces allocated globally, acquisition is on request from the maison or an authorised retailer in the Middle East.

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