Since its introduction in 2015, the Slim d’Hermes watch collection has won over fans with its svelte forms (39.5mm across and about 9mm for the time-only models) and designs that are minimalist, but with just the right amount of whimsy, courtesy of a playful typeface designed by Philippe Apeloig.

Now, the luxury brand enriches this watch family with its first skeletonised model, the Slim d’Hermes Squelette Lune. (It is also the second skeletonised model in the current Hermes watch family, after the Arceau Squelette.) Marking another first, powering the Squelette Lune is the new H1953 movement, which is based on the Vaucher-manufactured H1950 ultra-thin, micro-rotor movement that powers the Slim d’Hermes time-only models. Hermes has a 25 per cent stake in Vaucher, which makes Parmigiani’s movements and also supplies movements to brands like Richard Mille.

Slim d'Hermes Squelette Lune

The use of this new proprietary movement should please those who were not won over by the third-party, albeit exclusive to Hermes, Sellita SW300 skeletonised movement used in the Arceau Squelette. It is also priced accordingly, with a retail price more than double that of the Arceau Squelette. Also accounting for the higher price are its case materials; the 39.5mm case is made of bead-blasted grade 5 titanium, while its bezel is made of platinum and its crown is white gold. The case and matte black alligator strap are made in the Hermes Horloger workshops in Switzerland.

Compared to the Arceau Squelette, the Slim d’Hermes Squelette Lune has a design that is a lot airier and more architectural. This is complemented by the muted, largely matte palette of its movement — which features elements such as a blackened mainplate — and an openworked dial that includes a black-gold flange with a sunburst finish.

Slim d'Hermes Squelette Lune

The bursts of colour here come from the movement jewels, blue PVD-coated hands and photorealistic double moonphase display at 6 o’clock. The style of the moonphase is reminiscent of that used by Hermes for its highly popular Arceau L’Heure de la lune moon-phase timepieces. And of course, even though all that extensive openworking doesn’t leave much real estate behind, Hermes has made sure to include the Slim d’Hermes’ signature numerals, which discreetly mark the hours along the transferred minutes track.

The Slim d’Hermes Squelette Lune retails for 16,500 euros (about S$26,440).