In November 2017 Ebay seller slotgirl777 from San Diego, California was selling this supposedly used Libyan plate.
It is one of a large batch of Libyan test or sample plates from the 1970s that have various words on them in all sorts of colours and often have numbers like this – 123457, 12345, 123456, etc.
The words on this one are Az-Zawiyah and agriculture. There is no way that in the 1970s this small Libyan governorate had over 123 thousand agricultural vehicles and this plate would certainly be very, very used looking if it was genuine. Also, in the 1970s, all non private vehicles had yellow plates.