Specimen substrate

Description

FIG. 1 is a top view of a specimen substrate, showing my new design;

FIG. 2 is a top view of detail “2” identified in FIG. 1, shown enlarged for clarity of disclosure; and,

FIG. 3 is a top view of detail “3” identified in FIG. 2, shown enlarged for clarity of disclosure.

The oblique lines represent a transparent or translucent surface.

In the drawings, the broken lines depict elements of the specimen substrate that form no part of the claimed design.

Claims

The ornamental design for a specimen substrate as shown and described.