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1 (of 3) Gustaf Dalén and his bicycle in a studio photo from 1895. The bike was at the time Gustaf Dalén's favourite object, and he saw a great potential for its technical development and improvement, for example the brake mechanics.

Source: AGA AB, Lidingö, history archive Photographer unknown Public domain via Wikimedia Commons

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2 (of 3) Portrait of Gustaf Dalén, 1926.

Source: Reportagefoto Photographer unknown Public domain via Wikimedia Commons

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3 (of 3) Gustaf Dalén and his wife Elma outside their home Villa Ekbacken at Lidingö, Stockholm, Sweden, 1937.

Photographer unknown Public domain via Wikimedia Commons