Rail profile set, cased, for flat-bottomed rail, by Glass Developments Ltd, London c.1955. Rail profile set
Rail profile set, cased, for bullhead rail, by Glass Developments Ltd, London c.1955. Rail profile set
Model force pump by Glass Developments Ltd., London SW2, made of glass and mounted on a wooden stand with porcelain reservior Model force pump by Glass Developments Ltd, 1950-1970