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The ornamental design for letter opener, as shown. |
FIG. 1 is a perspective view of a opener showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top elevational view thereof;
FIG. 5 is a left side plan view thereof;
FIG. 6 is a right side plan view thereof; and,
FIG. 7 is a bottom elevational view thereof.
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