With Stylised Wing Carving and Heart Shape Aperture Hand Carved Birchwood with Traces of Original "Rosemaling" Norwegian, Telemark, Initialled "TNS" and Dated "1741"
Related Literature: Per Terje Norheim; "OLHOLNER og andre drikkekar av tre. The Gunderson Collection, Del. 1" 2018; A closely similar example, almost certainly by the same hand, is illustrated on the cover and illustrated and discussed on Page 72. Another example by the same hand and dated 1746, is held by the Oyfjell Museum, Telemark and another is held in the Norsk Folkemuseum, Oslo (Museum Number NF1992-504).
Per Gjaerder; "Norske Drikkekar Av Tre"; Universitetsforlsget, 1975; Illustrates and describes a further example, Page 187, fig. 257.
