Blue Danube | Unicum

Blue Danube | Unicum

Watch case

Solid 43 mm diameter platinum case with anti-reflective, domed sapphire crystal and flat sapphire crystal on case back. Pusher and crown are made of solid platinum and decorated with guilloché. Screw-in sapphire crystal case back and bezel. Navy blue alligator skin strap with platinum buckle. Hand-skeletonized Sterling silver dial with overlapping displays and decorated with original Breguet frosted finish.

Movement

The 26-jewel movement is based on an historical minute repeater with split-seconds chronograph and manually wound. It was made by Patek Philippe for Tiffany New York about 1890. With a diameter of only 36.5 mm, this tremendous assembly of complications is rare in such a small movement. The compensation screw balance with blued Breguet spring beats at 18,000 semi-oscillations per hour. Keeping in mind that this movement is already about 120 years old, it is doubtlessly a sensation and tribute to historic watchmaking.
The detailed restoration of the more than 400 components of this extraordinary, complicated movement required intense attention. Every single component had to be disassembled, treated and restored, some had to be entirely replaced and, of course, they all had to be reassembled to form one functional unit after treatment.

 

The base plate was first hand-skeletonized and hand-guilloché before being coated with the blue platinum developed by GRIEB & BENZINGER. The three-quarter plate was also hand-skeletonized and guilloché, coated with rhodium and rose gold. Every single bridge was skeletonized, guilloché and rhodium-plated, the hand-engraved balance cock was rhodium- and rose gold-plated. The visible spring barrel was guilloché. Even the wheels were guilloché, and the heads of all steel screws were polished by hand and classically tempered a cornflower blue over an open flame. All strike train parts including two polished steel hammers with two gongs, levers and springs were polished and beveled.

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