1930s BLACK DIAMOND STRINGS Vintage BOX Single Hawaiian Guitar A Or 3rd Steel National Musical String Co. For Oahu, Kay, Supertone, etc. 100% original. New Old Stock from former music store, never used. 1 partially sealed pack of 10 strings and 1 loose, each is individually wrapped inside their envelope. The strings may show age and possible corrosion and can be used however you like. Many people use these for case candy or display and others may string them up on their vintage instruments. Either way, these are sold as-is, where-is, with no guarantees implied. Includes original box in excellent condition, writing under lid inside bottom. Classic! SHIPPING BASED ON LOCATION. Please pay immediately after purchase. Be sure to check our other items!