Chariots on Fire uses its resources to describe items to the best of our ability. Dating and period attributions are not an exact science as decorative periods frequently overlap and borrow influences from one another. Authenticity, antiquity, decorative periods, vintages and or circa dating are determined to the best of our ability based on materials incorporated, methods of manufacture, design, hallmarks & signatures, technological developments and consultation of our extensive reference library and materials. For these reasons there are no certificates of authenticity available for vintage pieces.