Balance cock Small metal plate screwed to the visible side of the movement. It carries the balance wheel shaft bearing.

Whiplash precision index adjuster An adjusting device composed of a steel spring in the shape of a swan's neck, a pointer, and a setscrew. The screw is used to adjust the beat, or the timing, of the watch in very small increments.

Kaiser William II presented this "A. Lange & Söhne" pocket watch as a gift to Sultan Abdul Hamid II on the occasion of his visit to Turkey in 1898. Today, the precious timepiece is part of the collection of the Topkapi Sarayi Museum in Istanbul. - Gilt movement with 16 rubies, engraved | balance cock, | whiplash precision index adjuster, compensation balance with gold screws, lever and escape wheel in gold - Enamel dial with small seconds. Signature: A. Lange & Söhne, Glashütte b. Dresden - Lavishly decorated 18-carat gold case with 18 rubies and 57 brilliants - Sprung cover with enamel portrait of Kaiser William II.