Plastic globe lamp identification  

I have a set of these and can't figure out who made them.  They are plastic. The knob to turn them on is also plastic and has an F printed on it. Inside the lamp is a tag "This unit may be safely used with bulbs up to and including 60 watts. Do not exceed 60 watts." I've dove into Joe Colombo possibly for arteluce or artemide.  I didn't see others like this. I looked into Flos and Fellini (due to the F on the knob...but I'm thinking an F knob might be commons since I saw 3 of them for sale on ebay)  I would love any input you have.  Thank you!