The Vintage Offer 
section of the Shop can be accessed by clicking on the Special Offer
old icon
current icon
icon on the main screen or the Special Offer tab in the Shop.
Vintage Offers give players a second chance to purchase items they might have missed during a Special Offer. Usually, an item will be available in a Vintage Offer approximately ten months after its initial Special Offer. The Vintage Offer becomes available once a player reaches level 90, and offers change every Sunday and Wednesday at 15:00 (3:00 p.m.) CET.
See also: Special Offer 
.