Antique Double Egg Cup Stamped Sterling Silver

This is a antique double egg cup marked "Sterling" on the smaller cup.  There is also a hallmark next to "Sterling" on the smaller cup.  It is an arrowhead pointing left with a capital "S" inside of the arrowhead.  There is also a number on smaller cup "J101." Please see pictures for closer inspection.  The antique sterling silver double egg cup belonged to my late brother who bought the piece at an estate auction in Mountain Brook Alabama in 1997.  The antique double egg cup has a heavy surface of patina on it.  it is 3" inches tall. The largest cup is 1 7/8" inches in diameter. The smaller cup is 1 1/2" inches in diameter. It weighs 68.3 grams. The antique egg cup is in good condition.  The larger cup has a slight bend in the rim.  Please see pictures.