I'm jumping in here to see if anyone knows anything about Husqvarna (Viking) machines? This is old, green, looks good, motor sounds terrific but the needle bar won't go up and down. After inspecting through little "windows" (plates screwed on in strategic places) it seems there is a gear that slips away but when it is held in place the bar moves!! Model is CI 21 A. Any help you could give would be appreciated. In papers found in the case, it appears to have been purchased in 1959. No book was included with this machine, only a sheet of paper that describes what the Husqvarna Automatic is equipped with like "new take-up housing, new knob for controlling stitich length, new device for reverse sewing, and, a stop which limits the zig-zag width", with an explanation of each. The new take-up housing is the tension knob!! LOL! Too funny, but you get the picture.