A lovely detailed reprint of the operation and care of Petter petrol and petrol/vaporising oil engines, types A1 and A2 (air cooled), W1 and W2 (water cooled) dated 1951 onwards from serial number 1,500,000 1 to 3HP, 24 pages.
Petter A1, A2, W1, W2 1951 Onwards Instruction Book