Estimated sign (http://en.wikipedia.org/wiki/Estimated_sign)
is a good way to put a date on a perfume, since it was adopted during 1975-to-1980 for "packaging" purposes.
Is this correct?
I ask it, because I noticed today that UNGARO perfumes (Ungaro I, Ungaro II...) lack completely any estimated sign, both on box and bottle. It's very strange.