A stove, or any other type of item should be twenty years or older for classification as vintage. This age refers to the date of manufacture or creation of the item.
Classification of an item as vintage normally means both that it originates from a certain time period and exhibits a distinctive standard of quality that is characteristic of that period. The standard of quality usually correlates with the era of the item's production. For example, a vintage 1950s automobile represents a style and quality that is emblematic of the 1950s. An item that is vintage upholds the standards and expectations of that style and quality.