Calendar 1957

Westerner Calendar May 1957 with risque cowgirl sketch

This 1957 tear-off wall calendar is one of my favorite pieces of Westerner memorabilia. It features a white-bearded western styled artist surrounded by discarded drawings on the floor. His sketchpad depicts a smiling risque cowgirl with “I’ll be Friendly” text written below. 😮

Was this a promotional item or something for casino back offices?  Who was the original artist?

Westerner calendar May 1957 unknown artist signature