The broad arms and hour markers in very simple designs – triangles, circles, rectangles – are filled with a luminescent content emitting a long-lasting glow. Robert Mühle opened the doorways of his namesake Glashütte-primarily based brand name in 1869, although it specialised in creating precise measuring devices for other watchmakers https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/