For sale is a beautiful, matched pair of vintage Lufkin No. 139 Thin Steel Squares (3-Inch and 4-Inch models) in their original factory boxes. Made by the Lufkin Rule Co. in Saginaw, Michigan, these are premium, collector-grade precision tools from the golden age of American manufacturing.Unlike thick machinist squares, the flat "thin steel" design allows them to lay completely flush on your drawings, layout fluid, or wood stock, ensuring flawless accuracy with no parallax error.Why this set stands out:Complete Boxed Set: Includes both the 3" and 4" squares, their original cardboard boxes with clear end labels, and the original protective inner paper sleeves.Crisp Graduations: Chemically etched 16th and 32nd markings are clean, dark, and perfectly legible.Beautiful Patina: Honest vintage character with light surface patina from age, but absolutely no deep rust, pitting, or damage to the edges.Ready for Work or Display: Perfect addition to a tool collector's display cabinet, or a highly accurate layout upgrade for a modern woodworker, machinist, or toolmaker.
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