"Van Cleef&Arpels" is a "Great and Complicated" (at the same time) Perfume House.
"Great" because produced great -really great- perfumes: "First" (1976), "Pour Homme" (1978), and "Gem" (1987), to name the most famous.
But it is "complicated", too, because there are some difficulties in recognizing date of production of perfumes, especially the older ones. Box and labels can be sometimes really hard to understand, batch numbers have 3,4,5 or even more digits. Sometimes there is no label on the bottle, and you can get some clues from boxes.
Here are some useful tips to date "Van Cleef&Arpels" perfumes.