Manuals are in used condition and may have initials, names, grease or dirt on or in them. 

May have id or name under tape. This one appears complete and in nice condition. Original OEM Manuals

ONAN Generators Controls & Switchgear Master Service Manual - 922-0503 - 1989

AT, LT, LTII, OT, OTII, OTIII, BT ATS Automatic Transfer Switch, HA Control, Control-O-Matic

Technical Operation Maintenance Book