The Excelsior Motor Company were a motorcycle manufacturer and like other Midlands motorcycle companies (AJS and BSA) they turned their engineering skills to radio manufacturing in the 1920's.

This four pin valve holder is bakelite and uses sprung tension to hold the valve in place. The valve holder also includes nuts and bolts for panel mounting. The box (shown right) has the mounting template printed on it. The advert shown opposite is taken from Wireless World dated August 24th 1927 showing a selling price of 1 shilling. It's interesting to note that they also sold AJS chokes but I'm unsure of the business relationship between these two motorcycle companies.

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