That era is the 1970s, with this design originally appearing back in 1977. You really can see it in an OTT '70s bedroom too. But at the same time, this bold pattern, said to be inspired by the waves of the Finnish sea landscape, would be a great way to add a splash of colour to modern bedrooms.
The set is made up of one duvet cover and a pillow case, selling for £52. Contact the seller for availability of different sizes.