I have looked into the topic a bit, since we started discussing it in this forum. There actually seems to be two distinct DuPonts here. The DuPont signed on the pipe matches the logo of the DuPont corporation that started as a gunpowder mill back in 1802 and has grown since into the multinational conglomerate we know today. The pipe is probably made by a pipe manufacturer, and was stamped with the DuPont logo and given away as a gift to employees, for some sort of occasion. I am sure that you have seen this before - probably the best example that comes to mind right now are John Deer zippo lighters. Any road, the second DuPont, or better yet S.T. DuPont (ST standing for Simon Tissot), is a luxury goods company that originated in Savoy 1872, and today it makes lighters, pens, handbags so on and so forth. I thought to share this info on the group ...