{
  "comments": {
    "old": "(1M) is added, since Rev A with a higher matrix number is known to exist."
  },
  "legacy": {
    "cdtext_catalog": {
      "new": "0000000000000"
    }
  },
  "ring_codes": {
    "new": "GS-9108P-00902\t1MM1\tC\t66\nGS-9108P-00902\t1M8\tC\t68 IFPI L223 IFPI 3925",
    "old": "GS-9108P-00902 1MM1 C 66"
  }
}