Before the modern stamped style and after the script style embossing was the prismatic style embossed mold, shown here. This particular mold is slimmer with more shallow wire grooves.
This particular, Prismatic style has a hand embossed '2' Where the No.12 is. There are a little more rare and valuable.
This Hemingray No.12 (Prismatic) is hand-embossed with a ton of gas bubbles and is in excellent condition. This is one of the monst beautiful pieces of glass insulator history we have seen pass through Oasis Antiques ever! It is a sure0find for any insulator or antique glass collector!
(F-Skirt) HEMINGRAY/[Hand embossing '2']/Nº 12 (R-Skirt) PATENT/MAY 2 1893
