An opening in the frame reveals the vial made up of two clear "bubbled" glass bulbs connected together by a wax seal covered with red fabric tightened with a gray cord.
Orange silica sand flows inside.
Reference: This hourglass is illustrated in the book "Sabliers d'autrefois" Delalande on page 346 n° 69.
Dimensions: height 21 cm x diameter 9.2 cm.
France datable around 1750.