The limited-production convertible starts at $25,680, including a $980 destination charge.
Fiat notes that the price is "just $1,900 more than a base Fiat 500c Lounge."
The Fiat 500 1957 Edition Cabrio features a power-operated cloth top.
The Fiat 500 1957 Edition was introduced in 2014.
The special model is now available as either a hatchback or cabrio.
Details include a sport-tuned suspension, 16-inch forged aluminum wheels with a retro body-color design and a premium brown and ivory leather interior.
Exterior color choices include white, light green and blue.
Edmunds says: Car shoppers with a taste for vintage Italian styling and drop-top fun will want to put this one on their shopping lists.