15k yellow gold Vintage English Key (cobra) chain attached to solid English fob. All components stamped 15, professionally tested as 15k.
 
Weight: 20.9 grams
Length: 5 1/4''
Width: 3/4'' x 5/8''
Metal / Purity: 15k
Hallmarks: 15
Era: Victorian
Condition: Pre-Owned, Excellent Condition
Country of Origin: England