The image is a photograph of a sign on the side of a building that reads "The 17 HP Blackstone Engine". The sign is white with black text and is attached to a metal frame. The text on the sign reads "This 1920's air start Blackstone engine was used at Bookpurnong to run a complete packing shed driving an overhead shaft which then ran a number of machines via belts. It was donated to the Village in 1975 by the Ingerson family. This engine was originally run on crude oil but in later years it has been run on diesel. It is unique because it has a hot spot ignition with twin injectors. It also has its own two stage compressor which supplies air for running as well as storing air for starting. We have a similar set up to the original site driving overhead shaft which is also provisioned to drive other machines as they are restored."