Eagle marksman of the year 1952 win a bsa cadet major

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As i am a big fan of the bsa cadet and cadet major and anything related to them i have an advert from the Eagle comic 1952, at the schoolboys own exhibition 1952 on the eagle rifle range the champion of all crack shots will win a bsa cadet major and a trophy and eleven runners up will each get a bsa air rifle, now i have searched the internet i can find items about the schoolboys own exhibition but can not find anything about winning this bsa air rifle so i was wondering if anyone else would remember this shootng prize at the show or even better where is the trophy now, ( not much chance of finding the trophy i know ) i have the advert but dont know how to ad a pic.