I will be corrected if my memory is wrong, but as
I recall it, Revelation was the house brand used by
Western Auto hardware stores for guns made by
Marlin, Savage and, I believe, Mossberg and I would
not be surprised if there were others. (Kinda like
Sears marketing under the Ted Williams house
brand name, guns made by Winchester, High-Standard,
and others).
Western Auto marketed a Revelation .22 based on
the Marlin 99 or 60 models: check your gun against
a Marlin catalog.