1976 Norway Musical Instruments Postage Stamp Set (Partial)

This is a collection of five vintage postage stamps from Norway, specifically from the 1976 'Musical Instruments' definitive or commemorative series. The stamps are presented within a philatelic stock book page under translucent glassine strips. The set includes two identical green 100-ore stamps featuring a musician playing a Seljefløyte (willow flute), one of which bears a black wavy-line postal cancellation mark, indicating it was used. The other three stamps are mint or unused: a reddish-maroon 125-ore stamp depicting a Hardingfele (Hardanger fiddle), a blue 180-ore stamp showcasing a Langeleik (Norwegian zither), and a grey 750-ore stamp illustrating a Bukkehorn (goat horn). Each stamp is printed on white security paper with high-quality line engraving, featuring the country name 'NOREG' (the Nynorsk spelling for Norway) in a bold serif typeface at the top. The denominations and instrument names are clearly printed in smaller type. The stamps exhibit standard pinhole perforations on all four sides. The condition appears to be 'Fine to Very Fine' with sharp corners and no visible tears or heavy staining, though the cancelled 100-ore stamp has expected postmarking ink. These stamps represent a mid-century Scandinavian design aesthetic, celebrating national folk heritage through detailed monochrome and bicolore illustrations.