The three-dimensional, openwork movement and dial of the Nebula offer views into the very heart of the in-house manufacture calibre. Two mainspring barrels providing a healthy 90 hours power reserve at the top, find near-mirror symmetry with the small seconds display and dial-side balance below.

Besides the evident careful attention to balance, the powerful allure of the Nebula also derives from the meticulously calculated proportions and ratios of diameter versus height and the size and placement of every gear and wheel. Rather than being an assembly of disparate components – case, dial, and movement – Nebula was designed from the ground up to be completely holistic, with all components blending harmoniously into one.

The seconds’ dial acts as a bridge in supporting some of the intricate gearings. The movement bridges −there are no less than ten in this complex calibre, compared to four in a standard watch −form the dial.

Highly legible central hours and minutes rotate above the movement that was conceived and developed from the outset to be openwork rather than have material skeletonized as an afterthought. Dial side, symmetry at the top to bottom is provided by the two mainspring barrels above, which provide a power reserve of 90 hours, and small seconds plus the oscillating balance wheel below. Seven of the skeletonized and chamfered triangular bridges with polished edges, fixed around the perimeter of the movement and radiating inward, offer a contemporary take on traditional English movement architecture.

Not only is all the movement visible and highly decorated, all the most technically interesting and animated mechanisms, including the barrels, gear train, balance and escapement, and winding mechanism, can be appreciated from the dial side. But that’s not to say the underside of the movement is something to be overlooked. The view through the display back reveals even more of the superlatively hand-finished movement, with its skeletonized and chamfered main plate with polished edges, solid 18-carat gold chatons and gears featuring polished chamfers.

The Nebula is available in a 41.50 mm, 18-carat red gold or stainless steel case, with a sapphire crystal display back case for viewing the hand-finished movement.

About the name

“Nebula” (Latin for “cloud”) refers to the astronomical term describing a giant cloud of dust and gas thrown out by the explosion of a dying star. Nebulae are also regions where new stars are beginning to form. The seven bridges on the dial side radiate from the centre toward the perimeter and give an impression of a stellar explosion to the sculptural movement.

Functions: hours, minutes, small seconds

Movement: Calibre A&S5101, mechanical manual-winding

Jewels 24

Diameter 31.50 mm

The thickness of 4.04 mm

Power reserve 90 hours

Frequency 3 Hz / 21,600 vph

Decoration main plate: NAC-

bridges: palladium, chamfered, with polished edges and brushed surfaces

wheels: polished and chamfered

screws: bevelled and mirror-polished heads

chatons: 18-carat red gold

Dial: light grey (gold version)


Material 18-carat red gold (5N)

Diameter 41.50 mm

Crystal cambered sapphire with an anti-reflective coating on both sides

Back sapphire crystal

Water resistance 30 metres / 100 feet

Strap: Material hand-stitched brown alligator leather

Clasp pin buckle 18-carat red gold (5N)

Reference1NEAR.S01A.D135A (gold version)

Slay Billionaire offers free and insured worldwide delivery. You can expect your timepiece to be delivered in average within 2-5 working days for the UK and European Community, and 4-8 working days for the rest of the World.

Concierge Price: $46,389
Includes complimentary worldwide shipping

Instructions to purchase: click the Buy Now link above, enter the title of this post in the enquiry field, fill in the necessary details and click send. Slay Concierge will contact you to confirm details

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