Forged Steel wing divider (also known as a compass or marking caliper), Used in carpentry, metalworking, and machinist tasks to scribe circles, lay out arcs, step off distances, or transfer precise measurements from a ruler to a workpiece

Nice piece - see pictures

I think it is marked Sampson Tool & Mfg. Co. (based in Newark, NJ). See picture

Era: Mid-20th century (commonly found from the 1940s-1960s eras of American manufacturing).

Materials: Forged and hardened steel with adjustable tension hinges and thumbscrews.

Caliper is approx 9 in whne closed. Opens to about 8.5 in max

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