An indicator to be secured inside of the glass cover of a meter to show when the meter is rotated as a unit, the indicator includes a frame fixed to the meter and a flag member in a normal position hidden behind a portion of the frame and which flag is movable between the normal position to a second position wherein the flag is visible whenever the meter is rotated about an axis perpendicular to the face on which the indicator is mounted and the indicator includes magnetic means to hold the flag in the second position so that one inspecting the meter will know that it has been physically rotated or tampered with.