Ruston and Hornsby 1XHR 8hp engine.

Manufactured by Ruston and Hornsby, Grantham, Lincoln.

The HR range of horizontal Diesel engines were produced from 1929 to 1965 in a wide range of sizes from the 1HR (5 1/2hp) to the 10HR (87hp).

This model is the 1XHR being 8hp and dates to c1940.