The signature in the sphere compared to other signatures is 2002.
RARE Craig Zweifel Art Glass Christmas Ornament 1997 Iridescent Signed Vintage
Vintage Craig Zweifel Art Glass Contemporary Style Gray Blue Green Weed Pot Vase
Craig Zweifel Art Glass Paperweight signed and dated 78
Vintage Craig Smith Art Glass Iridized Butterfly
Craig Zweifel Hearts Ivy Spade Leaves Vines 3.25" Art Glass Paperweight 1/1982
Craig Zweifel SIGNED Heart and Vine Art Glass Paperweight 57905
