Vintage Dutch New Old Stock Bovine Horn Whistle with Stophole  66 to 76mm - specify preference or you will receive one selected at random . I bought these from a Dutch dealer who had travelled over to the UK , he had recently cleared out an old horn factory in Holland . I bought a quantity of these whistles all of which were in a dusty old box ,individually wrapped in 1940's/50's newspaper when I purchased them & we were amazed to find them in brand new condition despite their vintage