Koltuk is an upholstered bed with a slender open timber frame which allows the the enjoyment of its simple geometry. Designed by Autoban and manufactured by De La Espada for the Autoban brand. Koltuk is an upholstered dining chair with a slender open timber frame which allows the the enjoyment of its simple geometry. Designed by Autoban and manufactured by De La Espada for the Autoban brand. Koltuk is an upholstered dining chair with a slender open timber frame which allows the the enjoyment of its simple geometry. Designed by Autoban and manufactured by De La Espada for the Autoban brand.