My bet is that you are out of luck on this question. The Bible for looking up info. on old shotguns is Bob Hinman's "The Golder Age of Shotgunning" and all he has to say about F. A. Loomis is "Hammer 12 guage, laminated barrels. No proof marks. nothing further known".
My bible is Charles Carder's "Sides By Sides Of The World For Y2K", and it says Loomis was likely a dealer (maybe in Connecticut) for whom guns were made by Crescent Arms Co of New York. Much longer entry for Crescent. Guns were both laminated barrels and steel. Locks were both outside hammer, and hammerless. I have one, steel barrels, outside hammers, wish I knew what the numbers meant (mine is 13) and what in heck is I.X.L.?
Unknown.
Sold by Sears Roebuck. Probably manufactured by Stevens.
"Your" Winchester Model 21 Double Barrel Shotgun was manufactured in 1933, giving it an age of 77 years, as of 2010.
1966 to 1988
If it is side-by-side, probably Stevens.
Hunter Arms Company, Fulton, New York
when did the make the smithsonian double barrel shotgun
What is the value of a Beebe arms double barrel shotgun?
Would need to know the other markings as well.
I would guess it was made by Stevens.
To determine the exact value of a Parker Brothers 12 gauge double barrel shotgun manufactured in 1878, there are a few factors that would need to be taken into consideration. Most important of these factors being, the condition of the shotgun.
The shotguns were manufactured by Ithaca from 1921 through 1947. Yours was manufactured in 1928.