The product is a 1957 D/D Franklin Half Dollar in BU (Brilliant Uncirculated) condition, minted in Denver. This coin is composed of 90% silver and has a denomination of 50 cents. It features the image of Benjamin Franklin on the obverse and is a business strike type. It is a variety with a "D/D" mint mark, making it a unique and collectible piece for numismatists interested in US coins from the mid-20th century.