The Dornblueth & Sohn Calibre 99.4 draws its design cues from the Calibre 99.1, but adds a date complication at 3. This date function features a quick set button at 2, and perfectly balances the seconds register at 9.
The 99.4 features the traditional German 3/4 plate design, beveled edges, screw balance wheel, swan neck regulation, engraved balance cock, screwed gold chatons, and blued screws (by flame of course, including the slots).
The name "D. Dornblueth & Sohn, Kalbe i./S.A." is hand engraved and not machine engraved, a virtually rarity on any watch. And all of the decoration (Côtes de Genève and the sunray finish on the crown wheel and ratchet) are all done in-house, by hand. You'll notice that the movement is rose gold in appearance - this process itself is elaborate.
After cutting and polishing the plate, Dirk treats the surface to turn the metal a copper color. After all of the drilling and milling operations are complete, the movement itself is treated with rose gold to enhance the deep color.
The dial is coated in silver, and is matte finished with black Arabic numerals and Glashutte "railroad track" markings around both the dial and subdial. Blued steel hands.
This watch features a brushed and polished nickel-free steel case and the crown is signed D. Dornblueth, as is the tang buckle. Power reserve is 50 hours.
This watch ships on a black calf leather Dornblueth strap with Dornblueth stamped tang buckle.