Here is a nice clear Kerr flat top Dp1 with date code 72 with one dot, a 1973 insulator mold number 23. Made in Millville, NJ. These make nice upside down candle holders or look cool displayed upside down in your collection. Has a small shallow flea bite to upper dome above reverse made in USA and a shallow annealing fisheye below bottom wire ridge above Dp1. Very hard to see both imperfections. Only asking $100 plus shipping and insurance.