The cards are highly collectable, especially among Subbuteo collectors. The game was available from the 1947-48 season, throughout the 1950's, right up until 1964-65. A complete version of this collection is currently on sale on the Subbuteo World website for £349.
The only thing I know about this card is that it uses the same "Webber" photograph as the D.C. Thomson Footballers series from 1923. It has a plain back, it may be a proof or even a packet issue looking at the border and the way it has been cut, it seems as this card is unrecorded, so the value is anyones guess.