{
  "comments": {
    "new": "Volume Label: ROL DISK 4"
  },
  "legacy": {
    "write_offset": {
      "new": "-12, 0",
      "old": "-12"
    }
  },
  "ring_codes": {
    "new": "X11-91196\t(HD211B) IFPI LB25 IFPI 4K20\nX11-91196 R2N IFPI L250 01 IFPI 4121",
    "old": "X11-91196\t(HD211B) IFPI LB25 IFPI 4K20"
  },
  "serial": {
    "new": "0206 Part No. X11-91195-01, 0206 Part No. X12-04353-01",
    "old": "0206 Part No. X12-04353-01"
  }
}