The Civil War period Confederate Navy hat insignias are embroidered on a black or gray background, with silver/gold anchor & stars encircled by gold wreath or just a silver fowled anchor on gray background depending on rank.
C007-CSN-16A is Three Gold stars, CSN embroidered in Gold, Silver & Gold fouled anchor encircled in Gold wreath on gray or black background.
C007-CSN-16B is Three silver stars underneathsilver fould anchor & Gold Wreath on a gray background.
C007-CSN-16C is Four silver stars with silver fould anchor and agold wreath on a gray background.