A yellow metal and blue enamel calendar locket. Featuring an adjustable day/date spinner to one side

A yellow metal and blue enamel calendar locket. Featuring an adjustable day/date spinner to one side and a memento mori emblem of a scythe and a sand timer to the reverse. Unmarked. Surface tests in the range for 18k. Gross weight including glass and photograph 10.6 grams approximately.