These days you could be forgiven for mistaking a Volvo for a Honda, or vice versa. But once upon a time, car designs from different carmakers were so unique there was simply no confusing them for anything else.

"Curves of Steel," an exhibition that launched this month at the Phoenix Museum of Art, recalls this era by showcasing "22 of the rarest and most stunning cars ever to be presented in one show."

Although models from American and European carmakers from the 1930s to the present day will be on display, the bulk of the cars are from the '30s, an era when fledgling aerodynamic studies first brought the word "streamlined" to the lips of designers.

For those of you that want to see the exhibit but can't make it to Phoenix, you can order the 192-page, 200-photo book on the exhibit by clicking here.

[Thanks to S. Krause for the tip!]