DC Comics Hard Rock Cafe Guitar Button

Manufacturer: TBA.
Year: TBA
Description: Guitar shaped button featuring an image of Wonder Woman, Batman, Superman and Spiderman as well as the Hard Rock Cafe logo The appearance of Spiderman on a button with DC Comics written on it is rather strange considering Spiderman is a Marvel character. More information on this item needed - in particular the year of production and confirmation if it is in fact an authentic Hard Rock Cafe item. Please contact webmaster if you have any information to share.
Approx Value: TBA