However, there are variations to the marking depending on the lamp's age and origin. Some earlier lamps may have a "Tiffany Studios" label instead, while others might have a "Tiffany Lamps" label.
Here are some additional things to consider:
* The age of the lamp: Lamps made before 1991, when Dale Tiffany Studios was established, will not have the "Dale Tiffany" label. Instead, they might have a label indicating "Tiffany Studios" or "Tiffany Lamps."
* The style of the lamp: Some lamps made by Dale Tiffany Studios may not have the "Dale Tiffany" label at all. This is particularly true for some of their more minimalist or contemporary designs.
* The location of the label: While the "Dale Tiffany" label is typically found on the bottom of the lamp base, it can sometimes be found on the lampshade or even on the inside of the lamp base.
Authenticating Dale Tiffany lamps can be challenging, so if you're unsure, it's best to consult with a knowledgeable antique dealer or appraiser.