The Ediswan PV2 design dates to 1925 and was made in both bright emitter and dull emitter versions. The valve in this box carries the BVA logo so dating it to the later 1920s. This folded carton has a flap lid. Inside the valve is held by a cardboard liner. The box is 67 mm square and 140 mm tall. The similar design for the GP2 box features an image of a nurse - nurse your set.
 
 
 
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