Box of "Hydroflex" carborundum abrasive discs 7/16" type B, by Associated Bental Products, Purton, Wilts., 1930-1955 Box of "Hydroflex" carborundum abrasive discs 7/16" type B 1930-1955
Box of "hydroflex" sand abrasive discs, 7/8" type A, by Associated Dental Products, Purton, Wilts., 1930-1955 Box of "hydroflex" sand abrasive discs 1930-1955