The ornamental design for a testspecimenholder, as shown and described.
FIG. 1 is a perspective view of a test specimen holder showing my new
design, the holder being in the assembled rolled condition for the testing
process;
FIG. 2 is a top plan view thereof, the holder being flat and unrolled for
the ease of mounting the test specimens, the bottom view being identical;
FIG. 3 is an enlarged end elevational view of the clip which maintains the
holder in the rolled condition;
FIG. 4 is an end elevational view of the holder as shown in FIG. 1;
FIG. 5 is a side elevational view of the holder as shown in FIG. 1.