Trilobal boxwood case
Venice, 1680. Trilobal boxwood case for bow glasses. Both sides are inlaid with a medallion bearing the letters NBP. Two spectacles can be accommodated within. Whalebone bow glasses in it.
Wooden case with ray skin
France, 1770. Wooden case covered with ray skin (Galuchat) with trefoil shape. The interior is lined with salmon cloth, for 6 bow spectacles. With gold hinge.