From RROCA-info

20-25HP (1929 - 1937)

• Chassis Specifications
• Service Instructions
  • Valve and Ignition Timing Data
    • Timing Diagrams
• Owners Handbooks
  • Handbook for 20/25
  • Handbook for 20-25HP Numbers XII & XIV
  • Handbook (Combining Nos. 9, X, XI, XII, XIV, XV, XVI editions)
• Wiring Diagrams
  • Chassis GXO to GFT
  • Chassis GBT to GAW
  • Chassis GEX to GFE
  • Chassis GAF to GTK
• Service Bulletins
• Spare Parts
• Miscellaneous
• Web Links
  • Phantom III and 20/25 – Fascinating Technical Information from Stephe Boddice

N.B. Sections are empty where content is not yet available.