A sign system for displaying product information proximate a product being vended. The sign system includes a support for maintaining a sign system at a predetermined orientation. A substantially planar face is appended to the support having a front surface and a rear surface. A primary sign is releaseably retained to the front surface of the planar face, the primary sign having an opening or window therein. At least one channel is configured to the front or rear surface of the planar face and positioned substantially behind the opening or window of the primary sign. A secondary sign is releaseably retained within the channel such that at least a portion of the secondary sign is visible through the opening or window in the primary sign.