Pair of Per Lütken Table Lamps or Vases Holmegaard 1961

Rare pair of Per Lütken vases that transform into lamps, mouth-blown glass in  petrol green from the „Grønland“ series for Holmegaard glassworks in Denmark, 1961. 
Both are signed with the artists initials and marked with the year of manufacture. 
The lampshades can easily be plugged on or off.