Zimbabwe African Handmade/Painted Serving Platter & Bowl. Artist signed on backs

Beautiful hand painted (Ceramic or Clay or?) serving tray and large serving bowl, autographed in painted signatures by the Zimbabwe Artists commissioned by Penzo to fabricate and paint these surreal African Scenes of the great wildlife in their protected parks. I purchased these back in 2002 from a Napa Valley SCI Conservation banquet auction. They are both in pristine condition, and the platter tray was used maybe twice for serving pre-cut lunch meats. NO Cutting ever done on these. The painted scenes are original and in like new appearance. Truly OOAK.