Trying to date a Stevens 22-410

Stevens 22-410 with a Tenite stock.
I have learned they were made from 1938 to 1950….then switched to the Savage name
I would like to narrow the guns “birth date” down to a specific year but, from what I have researched, that may not be possible.
My gun’s marking do not provide many clues.
No date code stamping on visible barrel areas…believe that didn’t begin until 1948
No recognizable stamp on left side receiver…..just a tiny sideways light bulb looking impression.
No stamp on right receiver except the patent number
I am attaching some photos.
Your thoughts??