Antiques are often defined as collectibles over a century old, which show qualities such as rarity, good condition, beauty, quality, craftsmanship etc. Whilst items such as furniture and art conventionally are 100 years or older, cars are the exception to this rule; in the US, an antique car can be a mere 20 years old, whilst in the UK a vehicle must have been built at least 45 years ago to qualify for this title. Items crafted from antique porcelain, such as dinnerware, decorative ware and china dolls, are highly sought-after on the collectors' market; some of the most notable manufacturers of antique porcelain include Wedgwood, Capodimonte, Sèvres and Meissen. On the used jewelry market, the terms antique and vintage can often be confused, with vintage generally being used for a piece between 50 to 100 years old. Watches also follow the 100 year rule for the term antique, whilst a vintage watch can be a mere 25 years old.