pgmtoimgv(1) on Linux
The text 531601ca4fef, as Debian 12 (Bookworm) shipped it. The page shows this text now.
Portable Graymap to Pilot Image Viewer converter, version 2.1.
Flags it lists
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-4 -
-c -
-h -
-m -
-n -
-t -
-u -
-v