C. Three-body, solid, polished and brushed, stepped bezel, case band embossed with ?Calatrava? pattern, concave lugs, transparent screwed-down case back, sapphire crystals. The crown at 2 adjusts the time and winds the watch; the one at 4 adjusts the sky, lunar orbit and moon phases. D. Blue sky chart with gold star constellations and North/ South/ East/ West divisions, made from 3 superimposed sapphire crystal disks, outer divisions to adjust moon phases and sky, outermost Roman hour graduations, aperture for the moon phases. White skeletonized ?feuille? hands. M. Cal. 240 LU CL, stamped with the Geneva Quality Hallmark, rhodium-plated, "fausses côtes" decoration, 45 jewels, straight line lever escapement, Glucydur Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock-absorber, self-compensating free-sprung flat balance-spring, 18K yellow gold microrotor.Dial and movement signed. Diam. 43 mm. Thickness 10 mm.
Grading System:
USD 120,000 - 180,000
EUR 100,000 - 150,000
Sold: USD 163,400