Vietnam’s famous Dong Son drums are a relic of the sophisticated Bronze Age culture between 500 BC and 300 AD. A Dong Son drum (also called Heger Type I drum) is a bronze drum fabricated by the Dong Son culture in the Red River Delta of northern Vietnam. The drums were produced from about 600 BCE or earlier until the third century CE,; they are one of the culture’s finest examples of metalworking.

Source: https://en.wikipedia.org/wiki/Dong_Son_drum