Audemars Piguet Royal Oak Steel and Gold ref 4100SA slate dial with boxThe mid size Royal Oak packs a big punch that we love, especially the examples executed in steel and gold which ampfisize the designs lines so stylish. In contrast to the full gold models Audemars Piguet uses a different gold mixture which has a warmer tone, more towards pink gold which gives such a unique feeling to these watches. On many designs we personally prefer them therefor in the steel & gold execution! The 4100 was designed by Jacqueline