Metal Propellers of Purley Way, Croydon.
1925 Public company.
1925 The first constant speed propellor with two Leitner-Watts steel blades was made using a hub from A. Harper, Sons and Bean.
1937 General engineers. 
1961 Stainless steeel manufacturers handling plant and equipment for oil refineries, chemical works, dairy and ice cream trade and breweries. 240 employees. 
1968 Gained order for two distillation columns for the ICI Nobel Division at Ardeer.
Sources of Information
- The Engineer of 5th July 1968 p9
- Rotol by Bruce Stait. Published 1990. ISBN 0 9516815 0 8