Group Lot of Six Vintage Industrial Steel Metal Drafting Work Stool Chairs. Listing includes 6 various industrial steel metal work stools, some with adjustable backrests and height, masonite seats, very nice vintage set, quality American craftsmanship. One chair marked Lyon. Circa Late 20th Century. Measurements: 22-24" H x 16.5" W x 18" D x 22-29" Seat Height.