I recently acquired a set of 4 of these beautiful Estee Lauder keepsake perfume boxes in various shapes. This one is the egg shape with an intricate gold pattern. Written on the bottom of the egg in gold is "Created in Japan Especially for Estee Lauder Private Collection Keepsake Boxes."
It is my understanding that these boxes were issued in the Christmas brochures, one each year, in the late 1970's and early 1980's, and originally came with a small bottle of Private Collection perfume inside. Private Collection perfume came on the market in 1973. The previous owner stated she purchased this set about 35 years ago at the Estee Lauder warehouse sale in New York.
The egg measures about 2.75" long, about 1.75" wide, and about 2" high. It is in perfect condition. Please look for my other ads for the companion pieces. These are truly gorgeous pieces to add to your Estee Lauder collection.