Generally, an antique is more than 100 years old and items that are less than 100 years old, but not new, are referred to as vintage.
However, there are some exceptions to that rule – for example, there are very few automobiles that are more than 100 years old, so the oldest autos are called antiques, even though they may hail from the 1920s or 1930s. Also, some use 75 years as the cutoff point for an antique.
The world of antiques is more of a science than anything else because of the wide range of items and the ever changing market. Accuracy is key to finding true valley in any piece. When we say antique dealer we are also referring to collectable and vintage dealer because there are many different views as to what antiques are these days.