Planetarium Eise EisingaLimited / 12 pieces, 2020

The Planetarium Eise Eisinga reproduces, at wrist scale, a working orrery that has tracked planetary positions continuously since the 1770s. Christiaan van der Klaauw built the movement around a central dial that shows the real-time positions of the planets in the solar system, animated by an in-house automatic caliber with a 96-hour reserve. If you care about both astronomy and serious watchmaking, there is nothing else quite like it.

What it is

Eise Eisinga was a Frisian wool-comber and self-taught astronomer who, between 1774 and 1781, built a working planetarium into the ceiling of his home in Franeker, Netherlands. It is the oldest working planetarium in the world and still runs today, maintained largely as Eisinga left it. CVDK, the Dutch independent manufacture, has specialized in astronomical complications since the 1980s and holds a natural connection to this subject given the planetarium's location in the same country.

The 40mm Planetarium Eise Eisinga, introduced in 2020, translates the Franeker installation into a mechanical watch complication, with each planet's orbit represented at the correct relative speed. The collaboration is a natural fit for a small, technically serious maker with deep roots in celestial complications.

Buying notes

This is a low-volume piece from a very small manufacture, so supply is extremely limited and pricing is set by the maker without much secondary market to reference. Servicing requires CVDK or a watchmaker with direct experience in their calibers; general independent watchmakers should not attempt it. The planetary display is a conversation piece for the committed, not a practical complication, and buyers who expect it to be legible at a glance will be disappointed by the inherent complexity of reading an orrery.

Resale is thin because the buyer pool is genuinely small; this is a collector-to-collector market and patience is required. The 40mm steel case and automatic winding are approachable, but the price reflects the hand-decorated movement and the complication's depth, not brand recognition.

Market read

CVDK prices the Planetarium Eise Eisinga in the range where independent complications live, well above what movement complexity alone would justify in a mainstream brand but fair for what the manufacture actually produces in small numbers. Secondary market transactions are rare and tend to hold close to retail because supply is constrained by production capacity, not by hype. If you find one pre-owned in good condition with papers, it is unlikely to be deeply discounted.

Service expectations

The watch runs the CVDK caliber CVDK7836, an in-house automatic movement with a 96-hour power reserve. Service should be directed to Christiaan van der Klaauw directly or to a watchmaker with documented experience on CVDK calibers; the planetary complication requires specialist knowledge that most generalist watchmakers do not have. Keep service records and original documentation, as they matter significantly to any future buyer.