VTG National Twist Drill & Tool Co Decimal Equivalent Tap Drill Chart Metal Sign For Sale

Circa 1965 Vintage machine shop decimal equivalent chart by the National Twist Drill and Tool Co with the Chas. A. Strelinger Co of Warren, MI as the local distributor. Sign manufactured by the Donaldson Art Sign Co of Covington, KY. This was on the wall in a Detroit area machine shop for decades. Overall in good condition but with a few areas of corrosion shown in the photos. Please review all photos to assess the condition of any vintage item. This item will be sent in a well padded box.