Gazette du Bon Ton, 1920 - No. 8, p. LXX: advertentie juwelier Técla (1920) by Lucien Vogel, The Field Press, Naville et… https://www.rawpixel.com/image/13739624/image-paper-cartoon-faceFree Image from public domain licenseGazette du Bon Ton, 1920 - No. 7, p. LX: advertentie Técla, juwelier (1920) by Lucien Vogel, The Field Press, Naville et… https://www.rawpixel.com/image/13740777/image-paper-cartoon-faceFree Image from public domain license