24" Diamond Cut Belcher Chain. 9ct Yellow Gold measures 3.8 x 2.8mm in diameter and 24 inches in length. Longer than a standard bought chain there is more room for comfort and movement making it feel a much more substantial quality chain. Suitable for his or hers jewellery, The chain is fully Hallmarked as proof of quality. The belcher chain, also known as the rolo chain originated in Britain in the 18th century and was named after the bare nuckle boxer Jem Belcher. Jem was the Champion of All England between the years 1800 and 1805.