This is a piece that I have been carrying for about thirty (30) years or so. It is a key ring brass piece, about 1 1/4" across, that says," E.R.R. J.W. Strange, LETTER CUTTER, TAUNTON on the front, and the number 170 or the back. I am not sure of it's use, or if it is associated with the Erie Railroad. It is just something that I have kept for luck.