The ornamental design for an objectdisplayholder, as shown and described.
FIG. 1 is a right front perspective view of an object display holder showing the invention, in which the object display holder is attached over a frame for a computer screen, wherein the frame for a computer screen and the computer screen are shown in phantom outline;
FIG. 2 is a right front perspective view of the object display holder of FIG. 1;
FIG. 3 is a left side elevational view of the object display holder of FIG. 1, wherein the right side elevational view is identical thereto; and
FIG. 4 is a front elevational view of the object display holder of FIG. 1, wherein the rear elevational view is identical thereto; and,
FIG. 5 is a bottom plan view of the object display holder of FIG. 1, wherein the top plan view is identical thereto.
The broken line showing of a frame for a computer screen and computer screen is included for the purpose of illustrating environment and forms no part of the claimed design.