Necktie CW key
Pick your finest necktie and cut it with scissors like this.
Join the cut ends with a piece of elastic rubber band. Stapler works fine here.
Keying contacts are made of two safety pins and keying cable is soldered to them. Electric tape is needed for some insulation.
When the necktie is pulled downwards, the ends are drawn apart and the uninsulated parts of safety pins make keying connection.
Necktie ready for CW party.
The elegance of necktie telegraphy is seen in this video: