If permanent metal Labels are not realistic, perhaps, at least for the passing present, the use of personal Label fans?
Matsumiya Kayama (1686-1780)
TARist fan with Label text
To tremble the airs and aether of our regard.
collection Theatre of the Actors of Regard
Here's a set of three, used by your correspondent.
FIAPCE
LabelTitle
detail
A Person Looks At A Work Of Art/
someone looks at something...
LOGOS/HA HA