Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 129,273 pages of information and 204,289 images on early companies, their products and the people who designed and built them.
Plenty and Co of Eagle Ironworks,Newbury made steam engines for marine use
1800 Company formed
Description of a high-compression marine oil engine (as Plenty and Son). The two-cylinder is rated at 60 hp and the four-cylinder at 200 hp.
1911 Two-cycle crude oil engine (Goedkoop design) 
1920 Lost the contract to make the British Kromhout engine to Day, Summers and Co
1920 Engine for Floating Crane 'Mammoth' for the Mersey Docks and Harbour Board
1933 Engine for British Waterways Dredger No 3