Beautiful post war Copenhagen made Neutrofon Perle 4803. Very rare model in bakelite. No sign of use or wear. Powers up nicely and was serviced by a licenced radio mechanic. Price in 1948 415 DKK, which is the equivalent of 936 € in 2025 (!) The factory was first located at Store Kirkestræde 1 in Copenhagen , then from September 1927 at Gammel Kongevej 33, then from 1935 at Møntmestervej 17 in the Northwest Quarter , then from 1950 at Guldborgvej 22 in Frederiksberg and finally from 1961 to 1962 at Valbygårdsvej 64 in Valby . In 1925 the company was renamed Neutrofon and began selling radios under the name Neutrodyn . Own radio production began two years later. Many of the components were manufactured and sold in-house. The factory's radios were often called Guldsegl or Sølvsegl . Some of the models had push-button station selection, called an ether piano . Names such as Diamant and Perle were also used for several models over time. Neutrofon was a Danish electronics company founded by civil engineer Poul Petersen in 1922.