Made to look similar to the Mark-V deep sea diving helmets used by the US Navy from 1916-1974, especially during WWII which were usually made of copper and brass. This model contains most of the parts that a real diving helmet would have: the breast plate, the 12 bolted wingnuts, regulating escape, spit cock, and face plate. There is minimal exterior wear with the interior showing some minor scratches. Overall an interesting piece. Condition: (Very Good). Dimensions: 17"T x 17"W x 17"D.