The Finnish Glass Museum, Glass manufacturers’ brochures from the 1950s, Riihimäki, 1994, pp. 47, 52 Päivi Jantunen, Kaj & Franck: Designs & Impressions, Helsinki, 2011, p. 137
1958 Coloured glass. 4 1/8 x 5 3/4 x 2 7/8 in. (10.5 x 14.5 x 7.5 cm) Produced by Nuutajärvi Notsjö, Finland. Underside incised K Franck/Nuutajärvi/Notsjö -58.