Asmus Johannsen was born in Denmark but set up business in London in around 1859. He specialised in high-precision timepieces, particularly marine chronometers. He founded the brand A Johannsen & Co. and went on to rival the eminent Victor Kullberg, also from London, especially in the quality of his pieces. He submitted his pieces to the Greenwich and Kew Trials and was awarded high marks. Johannsen manufactured marine chronometers for the navies of India, Italy, Spain, Portugal, Austria and China.
Asmus Johannsen was born in Denmark but set up business in London in around 1859. He specialised in high-precision timepieces, particularly marine chronometers. He founded the brand A Johannsen & Co. and went on to rival the eminent Victor Kullberg, also from London, especially in the quality of his pieces. He submitted his pieces to the Greenwich and Kew Trials and was awarded high marks. Johannsen manufactured marine chronometers for the navies of India, Italy, Spain, Portugal, Austria and China.