|Note_en=Page of various advertisements for stationery items with a box concerning fountain pens, a [[Kaweco]] advertisement mentioning the [[Perkeo]] serie. Mention the company as ''"Heidelberger Federhalter-Fabrik, Koch, Weber & Co. A.-G."'' | |Note_en=Page of various advertisements for stationery items with a box concerning fountain pens, a [[Kaweco]] advertisement mentioning the [[Perkeo]] serie. Mention the company as ''"Heidelberger Federhalter-Fabrik, Koch, Weber & Co. A.-G."'' |