The Pi Tau Sigma Honor Society Lapel Pin from the Class of 1950 is a vintage collectible for mechanical engineering students or alumni. This lapel pin represents the prestigious fraternity and sorority organization and serves as a symbol of pride and achievement. Perfect for showing off your membership in the honor society or adding a touch of nostalgia to your collection, this unique piece of historical memorabilia is a must-have for any Pi Tau Sigma enthusiast.