ur 20 inch 'Tiesselinck' Ceiling Fixture, #1142 has six panels of mica on its hammered copper bottom with a decorative cut-out band around the edge, inspired by the designs of August Tiesselinck who was Dirk Van Erp's nephew and shop foreman. The ceiling plate measures 12 inches and has a decorative overlay of copper held on by rivets. This fixture sells for $2825.00