Swedish Double-decker
Double-decker or Dubbelplansfiol is a recent and colloquial name of the dominant variant of preserved Swedish violins with sympathetic strings; what they were called when they originated in the 18th century is not known. The Swedish collector of musical instruments Daniel Fryklund writes in 1921 that "In Sweden, the author has found several violini d'amore of a peculiar type with 4 strings and 8 resonance strings, of which the later are attached to small pegs, which are placed behind the larger screws for the playing strings in a pegbox which is extended backwards and such an arrangement of the pegs is not observed by the author on any other violin".