1970 Eterna-Sonic Watch Ad, Tuning Fork Outwit Gravity!

This is a 1970 ad for Eterna-Sonic Watches! The size of the ad is approximately 8.5x11 inches. The caption for this ad is "The Eterna-Sonic Timepiece. Its balanced Tuning Fork Outwits Gravity!" The ad is in great condition! This vintage ad would look great framed and displayed! Add it to your collection today!