From Team Fortress Wiki
In the March 15, 2011 Patch, several expensive crafting recipes were modified to be cheaper. To recognize items that had been crafted while the recipes were expensive, Valve upgraded them to Vintage quality.
In some cases, items that have been re-granted to users by Steam support (after being either accidentally deleted or stolen) were assigned Vintage quality.The hexadecimal color code for Vintage items is .
List of Vintage items
- [Undocumented] Added Vintage quality.
- Any of the following items crafted before this patch were turned vintage.