Kofod Larsen for Seffle / Säffle  

Seffle/Säffle is a Swedish...
Seffle/Säffle is a Swedish manufacturer that made some very nice mid-century stuff. They produced furniture for Ib Kofod Larsen and Tove & Edvard Kindt-Larsen. Kindt-Larsen as a rule were pretty demanding about carpentry so I think the build quality from Seffle was good.
Incidentally, Ib Kofod Larsen also collaborated with another Swedish manufacturer called OPE (I think it stands for Olof Persson) to make some superb furniture. OPE is another quality manufacturer in Sweden worth remembering.

Thanks!
That's really helpful. I received the sideboard yesterday, and will post some photos once I've had a chance to clean it up.