The bronze bell mould was unearthed in house site No. 22 of Namyang-dong relics in Tokchon City, South Phyongan Province.
It was made by grinding a very mild stone into the shape of a matchbox and hollowing out a bell-shaped groove in its centre and a slideway for pouring melted bronze on one side.
There is a hole of about 5 mm in diameter in the centre of the groove. It belongs to a very accurate mould in terms of its size.
It showcases the developed metal workmanship of Ancient Joson (early 30th century B.C.-108 B.C.).