2358 SERIALIZATION - National Firearms Museum
4-single letter prefix or suffix by Ser. No. 1965 5-single letter prefix or suffix by Ser. No. 1966 6-single letter prefix or suffix by Ser. No. 1967 7-single letter prefix or suffix by Ser. No. 1968 8-single letter prefix or suffix by Ser. No. 1969 Single letter (Y, Z, or L) followed by