Mexican sterling silver ring
Signed jbn mexico 925, eagle 3, circa 1955 - 1980 
size - adjustable - us 7 1/4 - eu 55 - 17.5 mm 
L. 2/3” W. 2/3“ H. 1 3o/8”
L. 1,5 cm W. 1,5 cm H. 3,5 cm
weight 17 gram.