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The company was created from the activities of two German entrepreneurs, ''Paul Kohler'' and ''Christian Schaefer'', in Pforzheim, in Germany around 1910,<ref>the majority of the data relating to this company comes from direct correspondence with the great-grandson of ''Christian Schaefer'', which allowed us to correct the errors and inaccuracies previously present on the page; some dates, such as that of the foundation or the closure of the original German company are still indicative; the names of the two founders are also in the patent {{Cite patent|GB|302015}}  (identical to  {{Cite patent|CH|130454}}) registered in the name of  ''Kohler & Schaefer''.</ref> and from the initial letters of their names was born that of the company. The company was initially dedicated to the production of multi lead mechanical pencils, in gold and silver, capable of changing four colours.  

The company was created from the activities of two German entrepreneurs, ''Paul Kohler'' and ''Christian Schaefer'', in Pforzheim, in Germany around 1910,<ref>the majority of the data relating to this company comes from direct correspondence with the great-grandson of ''Christian Schaefer'', which allowed us to correct the errors and inaccuracies previously present on the page; some dates, such as that of the foundation or the closure of the original German company are still indicative; the names of the two founders are also in the patent {{Cite patent|GB|302015}}  (identical to  {{Cite patent|CH|130454}}) registered in the name of  ''Kohler & Schaefer''.</ref> and from the initial letters of their names was born that of the company. The company was initially dedicated to the production of multi lead mechanical pencils, in gold and silver, capable of changing four colours.  

However, the Schaefer family managed the company mainly because Kohler left the business shortly afterwards. In Milan was founded the subsidiary with the Italian factory, the start of production is not known precisely, but according to an excerpt from a document of November 26, 1923, published in the book ''"The registered trademarks of the Italian Fountain Pens"'' there is an Italian branch with a representative Giuseppe Kügler, initially established in via Victor Hugo 2, then transferred to Corso Vittorio Emanuele 23, and then in via Conservatorio 6 in Milan (as shown by [[:File:1929-09-Kosca-Invoice.jpg|this invoice]] from 1929). The first trademark registration on their behalf was in 1929 ({{Marchio|40298}}), with a logo of the ''K&S'' initials; no trace instead of the number cited on the invoice (C.C.I. Milano 937773). In the same time the comapany registered also [[Spezial]] ({{Marchio|40301}}) and [[Spezial Super]] ({{Marchio|40299}}) trademarks. Much later, requested in 1938, is the [[Record]] ({{Marchio|59025}}) trademark, that was also renewed after the war.

However, the Schaefer family managed the company mainly because Kohler left the business shortly afterwards. In Milan was founded the subsidiary with the Italian factory, the start of production is not known precisely, but according to an excerpt from a document of November 26, 1923, published in the book ''"The registered trademarks of the Italian Fountain Pens"'' there is an Italian branch with a representative Giuseppe Kügler, initially established in via Victor Hugo 2, then transferred to Corso Vittorio Emanuele 23, and then in via Conservatorio 6 in Milan (as shown by [[:File:1929-09-Kosca-Invoice.jpg|this invoice]] from 1929). The first trademark registration on their behalf was in 1929 ({{Marchio|40298}}), with a logo of the ''K&S'' initials; no trace instead of the number cited on the invoice (C.C.I. Milano 937773). In the same time the comapany registered also [[Spezial]] ({{Marchio|40301}}) and [[Spezial Super]] ({{Marchio|40299}}) trademarks. Much later, requested in 1938, is the [[Record]] ({{Marchio|59025}}) trademark, that was also renewed after the war.

The Italian branch was managed by one of the four daughters of ''Christian Schaefer'' (''Margarete Schaefer'', called ''Gretel'') who successfully extended and expanded the production to include fountain pens and mechanical pencils, as well as gold and silver objects such as frames, ashtrays, special cutlery, and then jewellery such as cufflinks, earrings and pendants, some on its own brand and others for great jewelers. Another son of ''Christian Schaefer'', ''Walter Schaefer'', ran a branch (only commercial) in Argentina during the period in which he lived in that country (approximately from 1935 to 1950).

The Italian branch was managed by one of the four daughters of ''Christian Schaefer'' (''Margarete Schaefer'', called ''Gretel'') who successfully extended and expanded the production to include fountain pens and mechanical pencils, as well as gold and silver objects such as frames, ashtrays, special cutlery, and then jewellery such as cufflinks, earrings and pendants, some on its own brand and others for great jewelers. Another son of ''Christian Schaefer'', ''Walter Schaefer'', ran a branch (only commercial) in Argentina during the period in which he lived in that country (approximately from 1935 to 1950).