The logo of the owner "Ställbergsbolagen". The company is gone since long...

It is said that this sign once had a blue neon center - it surely must have been elegant. I guess the horn under was for signalling shift changes, but it may also have been used as an air-raid alarm.

Update 2009-10: It sure IS elegant !!! http://www.pbase.com/jakobe/image/117960954