I picked these off of the old telegraph line and from the ground they looked like plain old hemi-42s... or so i though. When i picked one up i noticed a weird wire groove and the only embossing was N.1 on one side and on the other E. 3 This pic is also dedicated to Mexican glass collectors. Has anybody ever seen this type before? I also found out that it is unlisted in the price guide and if you got any info or a price I would greatly appreciate it.