Christian Seeberg, athlete from Norway who also made ski bindings. He lived 1880 to 1937. This picture would be around 1900, perhaps he was in the military, he had a military career.
Unknown photographer
<a rel="nofollow" class="external text" href="https://www.nb.no/items/9891e2ab72aa34dda51cd8922092e79f?page=67">Norsk friidretts historie</a>