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[[Osmia]] had a great initial success, becoming in a short time the second largest producer of pens in the country, so that a plant was specially created to produce pens. In the late '20s however sales had slowed and margins were weak, so the company went into financial troubles. In this period [[Parker]], who was trying to expand its business into Europe, began to take an interest in [[Osmia]] which was acquired (or with whom took an interest, sources are unclear) in [[1928]]. In this period the company produced the [[Duofold]] for the European market, characterized by the imprint ''"Parker - Osmia A. G. Heidelberg"''.

[[Osmia]] had a great initial success, becoming in a short time the second largest producer of pens in the country, so that a plant was specially created to produce pens. In the late '20s however sales had slowed and margins were weak, so the company went into financial troubles. In this period [[Parker]], who was trying to expand its business into Europe, began to take an interest in [[Osmia]] which was acquired (or with whom took an interest, sources are unclear) in [[1928]]. In this period the company produced the [[Duofold]] for the European market, characterized by the imprint ''"Parker - Osmia A. G. Heidelberg"''.

During the same period the company continued to produce under the [[Osmia]] brand, with [[mottled]] hard rubber [[safety]] pens, [[lever filler]] pens and mechanical pencils, which retained the original logo on the cap. Around [[1930]], [[Parker]] withdrew because the [[Duofold]] sales did not have a great success because of a price too high for the German market, and a too rigid nib. The activity went on (or was given, sources are unclear) to [[Osmia|Osmia Gmbh]], again under the direction of the Böhler brothers. It was launched a new line, the [[Osmia Supra]], similar to the [[Duofold]], with an improved [[button filler]], and a brass enameled logo on top of the cap.  

During the same period the company continued to produce under the [[Osmia]] brand, with [[mottled]] hard rubber [[safety]] pens, [[lever filler]] pens and mechanical pencils, which retained the original logo on the cap. Around [[1930]], [[Parker]] withdrew because the [[Duofold]] sales did not have a great success because of a price too high for the German market, and a too rigid nib. The activity went on (or was given, sources are unclear) to [[Osmia|Osmia Gmbh]], again under the direction of the Böhler brothers. It was launched a new line, the [[Osmia Supra]], similar to the [[Duofold]], with an improved [[button filler]], and a brass enameled logo on top of the cap.

In [[1932]], facing financial difficulties for the return of investment to the [[Parker]], the nib factory was sold to [[Degussa]]. In [[1933]] the pen style was amended to follow the [[streamlined]] trend also used by [[Duofold]] of the same time. Were also launched other models: the [[Luxus]] line, a torpedo-shaped [[piston filler]], and the the [[Osmia Progress]], with a filling system similar to the [[Vacumatic]] one. Despite the financial troubles due to end of the cooperation with [[Parker]], [[Osmia]] got a good selling success.

In [[1932]], facing financial difficulties for the return of investment to the [[Parker]], the nib factory was sold to [[Degussa]]. In [[1933]] the pen style was amended to follow the [[streamlined]] trend also used by [[Duofold]] of the same time. Were also launched other models: the [[Luxus]] line, a torpedo-shaped [[piston filler]], and the the [[Osmia Progress]], with a filling system similar to the [[Vacumatic]] one. Despite the financial troubles due to end of the cooperation with [[Parker]], [[Osmia]] got a good selling success.