Two Vintage Heavy Brass Horse Head Bookends, marked PMG 88. Estimated less than 50 yrs old. Brass is a metallic alloy that is made of copper and zinc. The proportions of zinc and copper can vary to create different types of brass alloys with varying mechanical and electrical properties. It is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure. In contrast, bronze is an alloy of copper and tin. Both bronze and brass may include small proportions of a range of other elements including arsenic, lead, phosphorus, aluminium, manganese, and silicon. The distinction is largely historical. Modern practice in museums and archaeology increasingly avoids both terms for historical objects in favour of the all-embracing copper alloy. Brass is used for decoration for its bright gold like appearance and durability. (Wikipedia)Size And Weight: See Last Photo If Applicable. All Photos Represent The Lot Condition. Please Read Our Terms And Conditions.