Circa 1870, this intricately linked chain measures approximately 29" in length. It consists of a twisted figure "8" type link with a triple wrap detail. It is a very unique design. The links measure approximately 8.5 mm long and 5 mm wide. It is very three-dimensional. It is marked "750" on the clasp, but that may have been a later addition. It has a standard size secure spring ring. It is in excellent condition. No links are stretched or smashed. The overall weight is 20.9 grams. The first picture is most representative of its true color.