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In the early 1900s it entered the fountain pen market by importing pens as a Japanese retailer of [[Onoto]] and [[Waterman]]'s; in the late 1910s, ''[[Maruzen]]'' decided to also start a production of pens under its own brand name, using the brand names ''"[[Albion]]"'' and ''"[[Maruzen Orion|Orion]]"'', made of black chased hard rubber with eyedropper filler.

In the early 1900s it entered the fountain pen market by importing pens as a Japanese retailer of [[Onoto]] and [[Waterman]]'s; in the late 1910s, ''[[Maruzen]]'' decided to also start a production of pens under its own brand name, using the brand names ''"[[Albion]]"'' and ''"[[Maruzen Orion|Orion]]"'', made of black chased hard rubber with eyedropper filler.

In [[1919]] Maruzen launched what would be the longest-running fountain pen line in its history, the ''"[[Athena]] The Pen"'' (which later became simply [[Athena]]). The very first [[Athena]] produced were black chased hard rubber pens with either eyedropper filler or security eyedropper (safety pen type) and later were also produced twist filler and lever filler fountain pens. From the mid-1930s are the [[Athena Renaissance]], made of smooth ebonite usually coated with a layer of ''[[urushi]]'' lacquer, made with twist filler or eyedropper filler.

In [[1919]] Maruzen launched what would be the longest-running fountain pen line in its history, the ''"[[Athena]] The Pen"'' (which later became simply [[Athena]]). The very first [[Athena]] produced were black chased hard rubber pens with either eyedropper filler or security eyedropper (safety pen type) and later were also produced twist filler and lever filler fountain pens. From the mid-1930s are the [[Athena Renaissance]], made of smooth ebonite usually coated with a layer of ''[[urushi]]'' lacquer, made with twist filler or eyedropper filler.

The [[1937]] is the year when ''[[Maruzen]]'' took over the factory in which their branded pens had been made until then and thus began their own production.  

The [[1937]] is the year when ''[[Maruzen]]'' took over the factory in which their branded pens had been made until then and thus began their own production.

At the end of the war, a new factory was built near Tokyo (the previous one had been destroyed by the war events), and fountain pens in the [[Athena]] line underwent a new restyling in the 1950s: alongside the classic ebonite and lacquer ''[[urushi]]''' fountain pens, there were those made of colored [[celluloid]] or transparent plastic, and the caps began to be made of gold or nickel-plated metal.

At the end of the war, a new factory was built near Tokyo (the previous one had been destroyed by the war events), and fountain pens in the [[Athena]] line underwent a new restyling in the 1950s: alongside the classic ebonite and lacquer ''[[urushi]]''' fountain pens, there were those made of colored [[celluloid]] or transparent plastic, and the caps began to be made of gold or nickel-plated metal.