Thanks for replies,and compliment Bernard,the mark on the base is for 1950-66 and the inside is smooth,the cutting on the outside doesn't seem rough enough to use as a striker,it flares out to much for a candle holder however it is very heavy for its size and the glass is so hard you can understand why the term metal is used(I know all glass is hard this just feels hard,I'm not explaining this very well am I)Keith.