Sony HSR-1/1P Operating Instructions Manual page 15

8 ALARM indication
If there is an external alarm input, an "ALARM"
indication is superimposed. As this information is
recorded on the tape, the indication is also obtained in
playback.
9 NOT ORIGINAL indication
Thanks to the original watermark system, a "NOT
ORIGINAL" indication is superimposed, if the image
being played may have been artificially altered.
This indication can be seen only in Still mode (either
FRAME key pressed) with the full-screen display.
Note
This indication is disabled in alarm recording in
FRAME mode or when you switch the unit from high-
speed playback to variable playback.
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Chapter 1 Overview