Brand A. Lange amp SöhneModel Grand Lange 1Reference Number 137.038 white AI Dev Tools gold AI Medical Diagnostics 137.033 AI Powered Parenting pink goldDiameter 41mmThickness 8.2mmCase Material 18-carat white gold or pink goldDial Color Solid silver greyIndexes AppliquesLume NAStrapBracelet Hand-stitched leather strap in black or red-brown