The simple but original system of transmission of power between the two barrels extending the basic power reserve of a simple manual wound time piece to 90hours combined with a general skeletonised design aesthetic.
The name "Nebula" (Latin for "cloud") was selected because with its bridges designed from the perimeter of the dial toward the centre, the movement looks like an inverted, exploded star. Nebulae, an astronomical term describing a cloud of cosmic gas and dust, are formed from the debris of exploding stars and constitute the regions in our universe in which new stars are born.
Technical. A&S 5101
Manufacture calibre, skeletonized, hand-wound, 24 jewels, diameter 31.50 mm, two mainspring barrels, screwed balance wheel, thickness 4.04 mm, power reserve 90h, 3 Hz / 21,600 vph, adjusted to 5 position. Movement decoration: NAC-treated bridges and black ADLC-treated main plate. Chamfered bridges with polished edges and brushed surfaces, gold chatons, screws with bevelled and mirror-polished head.
In 2016, there were approximately 75 Nebula watches made 50 in steel and 25 in red gold.
Once the screws have been added to the movement a torque wrench set at a high couple is used to ensure the screws are tight.
The assembled calibre
Images of the case before assembly
Diverse images of the finished Nebula