British Rail Eastern Region - Fault Chart For BR / AEI Type 2 Locomotives
Issue Date Unknown Please Contact Me if you know the date of issue for this booklet   -   BR DUP: KX 249/66

More information can be found here Wikipedia - British Rail Class 25  Wikipedia - British Rail Eastern Region  
More Information Regarding Preserved Class 25 Locomotives can be found on the following websites:  Preserved-Diesels  Caledonian Railway Diesel Group