Vintage Gruen World Time-Teller Cardboard Calculator Wheel Watch Advertising

Vintage Gruen World Time-Teller cardboard calculator wheel designed to determine time zones across major global cities. This double-sided rotating disc features a yellow and blue color scheme with a list of international locations and their corresponding time offsets. • Condition: Good (G) • Brand: Gruen Watch Company • Material: Printed cardboard/paperboard • Origin: Printed in U.S.A. • Features: Dual rotating discs with city-specific time pointers • Design: Advertising for Irv Spritz jeweler in Danville, IL Item will be packaged securely and shipped quickly to ensure safe arrival. Keywords: horology, watchmaking, pan american airways, mid-century, ephemera, timezone, aviation, collectible, analog, travel Check out all of our similar items!