hi im new to the forum so bear with me,first sad to hear the passing of mr j walker met himthrough a old mate of mine a total gentelman, second i have in my posession one of his air rifles a one off no more any were, you may say i dont believe it but it is true,it is all totaly built by is own hand to is owm specification all hand built by him,i bought this off my mate who it was built for he new john for 25 years,john used to do all his guns for him and charge him and also my mate used to return favours for him before he died i was told apparently he was thinking about letting some one have is design but unfortunatly he died ,jus shows how brilliant a gunsmith the man was his early conversions have apparently doubled in price and so they should r i p