131 - Stephan Knapp British (born1921- ) British Enamel Plaque "Rider" Unsigned but Has Original 1959 Invoice and Gallery Label Attached en Verso. Original Purchase Price 160 Pounds. Very Good Condition. Measures 15-5/8 Inches Tall and 8-1/2 Inches Wide, Frame Measures 21-3/4 Inches by 14-3/4 Inches. Heavy. Shipping $90.00 (estimate $800-$1,200)