Trivia: What was the first 3-D comic to hit the stands 60+ years ago?

Long before lenticular covers, 3-D comics ruled the land of fun comic book gimmicks. What was the first 3-D comic to hit the stands 60+ years ago?

Previous
Previous

Trivia: Which of these inter-company mashups was released first?

Next
Next

Trivia: Which of these Batman villains was introduced first?