Possibly designed by Charles Pickslay, who made similar designs for the company 'Pickslay & Co' between 1870 to 1900 in New York, the same place where Black, Starr & Frost had their company.
Black, Starr & Frost Antique 19th Century American Sterling Silver String Box
Excellent antique condition. Only minor signs of age, and some light indentations, hardly visible. No scratches.
STERLING and BLACK, STARR & FROST
Weight: 122 g / 4.3 oz
Height: 8,7 cm / 3.4 in, total height
Diameter: 7,5 cm / 3 in