Picture postcard with views of Berlin, early 20th century (colour litho)

Ansichskarte; a promotional card published by the Berlin stamp dealer, Philipp Kosack, depicting his shop in the Burgstrasse opposite the river Spree, a view of the Hohenzollern Royal Palace from the Lustgarten and the equestrian statue of the Great Elector (Grosse Kurfüst) Frederick William of Brandenburg (1620-88) by Andreas Schlüter (1660-74); Philipp Kusack (1869-1938) was an internationally known stamp dealer and was a supplier to the Berlin Postal Museum (Museum für Post und Kommunikation), the oldest postal museum in the world, founded in 1898, and which acquired in 1901 and 1903 from Philipp Kosack two 'Post Office Mauritius' stamps, among the rarest and most valuable postage stamps in the world;