This is a beautiful set made using rhubarb glass - an odd lot that is no longer made and very hard to find. The glass is accented with fine silver wire. The antique key measures about 68mm long x 21mm wide (2.68" x .84"). The focal measures about 29mm long x 12mm thick (1.16" x .49") and is a bicone shape.
These are temporarily attached with white satin.