Founded in Paris in 1785 by Charles Leroy, L.Leroy is one of the oldest and most storied names in French watchmaking—appointed watchmaker to the royal court, then official supplier to the French Naval Ministry in 1835, a position it held longer than any other manufacturer. The house produced over 2,200 marine chronometers before electronic navigation rendered mechanical precision timekeeping at sea obsolete.
After years of dormancy, the Maison returned with intention at Geneva Watch Days last year, marking its 240th anniversary with the Osmior Bal du Temps—a minute repeater and flying tourbillon in a single contemporary case. Luckily for us, L.Leroy had these watches ready for our visit during Watches and Wonders Geneva 2026 two weeks ago, so we could work on this hands-on review.
The L.Leroy 'Bal du Temps' Minute Repeater Tourbillon is available in three references, and each has a distinct chromatic identity: ALD blue for the platinum (Ref. LL306/1), anthracite with gold for the red gold (Ref. LL305/1), and rhodium silver with an ALD-blue hand for the titanium (Ref. LL307/1). Each material tier reads as a genuinely different watch rather than the same design in different metals.
Things to Know About the Watch
"Bal du Temps"—dance of time—is both a poetic name and an apt technical description. The L.Leroy 'Bal du Temps' Minute Repeater Tourbillon watch displays the hour with a single central hour hand; activated by a slider at the 9 o'clock position, one can read the minutes acoustically via the minute repeater mechanism, chiming the hours, quarter hours, and the minutes, all differentiated by distinct tones struck by two hammers on two gongs on the back of the watch.
The dial is where the Bal du Temps makes its strongest visual argument, as there is no solid dial plate; the movement is the dial itself. The ALD-treated blue hour chapter ring on ref. LL306/1 in platinum frames an entirely open center, through which the movement is exposed in full: gear trains, repeater mechanism, and the flying tourbillon cage at 6 o'clock are all visible simultaneously, shifting with every movement of the wrist.
The blue ring carries applied rhodium Arabic numerals in L.Leroy's signature style with a single matching rhodium hour hand. The minimalism of the time display is deliberate, drawing the eye inward to the mechanics rather than competing with them. The "Swiss Made" inscription sits quietly at the base of the chapter ring, the only text besides the brand signature near 12.
The 43 mm tambour-shaped platinum .950 case measures 13.80 mm thick, with a domed sapphire crystal and 11.10 mm without. The sapphire crystal on the dial and case back sides is treated with anti-reflective coating. The polished domed bezel, fluted crown engraved with the double "L" monogram, and a caseback ring with frosted and polished relief engravings carry finishing details through to every surface.
Water resistance is 30 meters, and the watches are delivered on a black alligator strap with large scales lined with small-scale alligator and tone-on-tone stitching. The strap is secured by an open-worked folding clasp in matching case material engraved with the Maison's signature mark.
The flying tourbillon at 6 o'clock completes one rotation per minute beneath a polished titanium bridge engraved with the intertwined Leroy double "L" monogram. Production is limited, reflecting both the movement's complexity and the brand's deliberate positioning.
The Movement
Powering the L.Leroy 'Bal du Temps' is the manual-wound calibre L610SQ. This movement, produced exclusively in Geneva for L.Leroy is composed of 321 components and equipped with variable-inertia balance wheel with flat balance spring, a Swiss lever escapement, and a single barrel delivering a 90-hour power reserve. The minute repeater operates on two gongs with two hammers.
On the Wrist & Price
On the wrist, the L.Leroy Bal du Temps wears much smaller than its 43 mm case suggests. The tambour case distributes the case mass proportionally, and the polished platinum profile against the blue ALD chapter ring gives it a quiet, almost understated presence from a distance. Despite its platinum construction, the watch weighs 168 grams. The black alligator strap keeps the wrist feel slim and formal; its tone-on-tone stitching and open-worked platinum folding clasp are consistent with the overall restraint. This is a grand complication that wears its presence unambiguously.
Two of watchmaking's most demanding complications, 240 years of pedigree, and three material expressions for the Bal du Temps make a case that L.Leroy's return is on the right track.
Sticker Price USD 348,000 for platinum, USD 333,000 for 18K 5N red gold, and USD 300,000 for titanium. More info on L.Leroy here.
