There is a bubble in the glass on the rim of the ashtray that you can view up close in the last picture.
MCM Vintage Viking Glass Orb Ashtray Small Clear Amber Mid Century Modern 3.5”
MCM Vintage Viking Glass Orb Ashtray Small Slanted Green Mid Century Modern
MCM Vintage Viking Glass Owl Paperweight, Label Hand Made Mid Century 3.5" 1960s
Vintage Viking Glass Red Swan Dish MCM Collectible Art Glass Collectible Vintage
VINTAGE Viking Glass Ashtray Lot - (2) Orb Ruby Red (2) Amber MCM Art Glass
Vintage Viking Glass Cabbage Leaf Swung Glass Vase Yellow Frosted Base MCM 12.5"
