These are the two different shop numbers 1 and 6, as of 7/15/2011 in my collection. Looking for shop numbers 4 and 5 in narrow dome.

Known shop numbers for the pinch or narrow dome variant are 1, 4, 5, 6, 7, 10

Please read the Insulator Studies, CD 160 Mold and Shop Numbers on Insulator Wiki for detailed information. Thank you, Andrew Gibson for the documentation.