Hi,
this guitar was sold by the instrument trader P. L. Dieseth from Kristiania. Kristiana is the old name for the capital city of Norway. Now known as OSLO. The name Kristiana for Oslo existence till 1925.
Peder Larsen Dieseth lives from 1851-1936.
Your guitar looks like a Vogtland or Egerland build instrument at the beginning of the 20th century. The inlays at the soundhole and the inlays on the top (near the strap button) are typical for guitars of that region and that time.
Nice guitar! I hope this helps!
Regards,
STELOL
