Experimental Issue, March 1970

In 1970, phosphorescent bands were implemented such that machines could determine the difference between urgent and non-urgent rates. This process was initially tested in Clermont-Ferrand from March to May, 1970.

	30c green, for non-urgent rate, one band phosphor Sheets of 100, with corner date
	40c red, for urgent rate, two bands of phosphor Sheets of 100, with corner date
	Early dated corner block with phosphor