You can get the coupon at arbys.com/backto64 where Arby's is currently hosting what a "1964 version" of the Arbys website might look like if the Internet was around back then.
The coupon is only good on Tuesday, July 23, 2013 with a limit of one coupon per customer and one Classic Roast Beef sandwich per coupon at participating Arby's locations.
The Classic Roast Beef in normally priced at the $2.99 mark (which can vary with location).
