American traditional tattoos pin up are a popular type of tattooing that has been around since the 1940s. It is a type of design that has been adapted over time to fit the current trends and preferences of people. The traditional style of tattooing was initially inspired by the art of Norman Keith Collins, also known as Sailor Jerry. He was a prominent tattoo artist in the early 20th century and was known for his bold and colorful designs. He is credited with popularizing the American traditional style of tattooing, which includes bold outlines, bright colors, and iconic images. The traditional style was also heavily influenced by the designs of Japanese tattoo artists, who often used bold lines and bright colors in their designs.