This was an Original Imperial Glass Mould, it was the zipper pattern.
In the early 80's Summit Art Glass purchased this mould. They had a Rose Pattern Cut into the mould in the 90's.

1080 RDX
1 1/2" Red Carnival
Zipper Pattern Salt Dip
Retail $6.50

Special : Purchase 12 or more of the same color and style salt dip and save 10%

0499SP
Silver Plated Salt Spoon
Purchase 1 - 11 Pay $3.00/each
Purchase 12 - 50 pay $2.50/each
Purchase 51 - 99 and pay $2.00/each
Purchase 100 or more and $1.50/each

Summit Art Glass

Rosso Wholesale Glass

Early 80's to 2006

2006 to presant