Signature of Bob Wian
1956 Bob's Big Boy menu republished at Animation Resources website
https://animationresources.org/theory-big-boy-and-the-power-of-licensing-a-cautionary-tale/
https://animationresources.org/pics/bigboy04-big.jpg

Isolated and traced using CorelDraw X7
Robert C. Wian Enterprises (menu source)