The earrings have writing on it it says, 1792 - 1992 Bicentennial Celebration. I am assuming it is from the 4711 perfume. Here is some information from wiki
According to a legend, on 8 October 1792 a Carthusian monk made the merchant Wilhelm Muelhens (1762-1841) a wedding gift: the secret recipe of a so-called "aqua mirabilis", a "miracle water" for internal and external use. Muelhens then founded a small factory at Cologne's "Glockengasse" and established the first "Eau de Cologne" as a remedy. Allegedly, after some time even eminent personalities like Johann Wolfgang von Goethe and Richard Wagner were ranked among the users. At the outset of the 18th century, the Italian expatriate Johann Maria Farina (1685–1766) created a new fragrance and named it Eau de Cologne ("water from Cologne"), after his new residence, Cologne. Over the course of the century, the fragrance became increasingly popular.
Great Vintage Condition
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