Originally listed in our reference book RB.17 as P/94 this set was described as “50 ... Small Cards [which at that time was the word used for “standard” size]. Fronts in colour. Backs in grey, with descriptive text. Home issue. December 1930”. This card is actually of interest to exhibition collectors, because the text tells us that “The most successful method of extinguishing fires of inflammable liquids such as petrol, oil, etc., is by smothering the surface with a semi-fluid substance containing an inert gas. Merryweathers` speciality for this purpose is known as Fire Suds, and they exhibited at the Wembley Exhibition a motor Fire Suds engine which was the first of its type, and was afterwards supplied to Leeds.”