The ornamental design for a panel for display of time or frequency, or both, as shown and described.
FIG. 1 is a front elevational view of a panel for display of time or
frequency, or both showing my new design with typical, illustrative time
and frequency indications.
FIG. 2 is a front perspective view of that shown in FIG. 1.
The back of the panel is flat, plain and unornamented.