The ornamental design for a checkingmechanism for reciprocating operative devices including door closer systems, as shown and described.
FIG. 1 is a top plan view of a rocker-washer checking mechanism for
reciprocating operative devices including door closer systems showing my
new design;
FIG. 2 is a left side elevational view thereof, the right side being a
mirror image of that shown;
FIG. 3 is a top, front, and left side perspective view thereof; and,
FIG. 4 is a front elevational view thereof.
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