Timepiece was Designed by Lange and Sohne. The Watch Displays Type B Dial Hour Markers, Designed to Assist In The Dark. B - UHR Translates to Observation Watch, As They Were Designed with Great Legibility In Mind, This Watch Dates Back to 1942, Measures 55mm In Diameter. The Case Number of The Watch Is FI23883. This B- UHR From a Lange and Sohne Is a Timeless Classic. All Overall Condition Is Excellent, and Working at time of Cataloging.