A pin-up model is a model whose mass-produced pictures see wide appeal as popular culture. Male pin-ups were less common than their female counterparts throughout the 20th century, although a market for . One of the magazine's mission statements is "to promote and showcase retro and modern pin up girls". Oct 15, - A retro look for the modern world. She may even look familiar to you, because in addition to her Instagram account, she is a model whose.