Model 21 Cody Info
 

If it doesn’t say Checkered Butt
is it safe to assume it originally had a butt treatment other than a checkered butt.
A concern is that this gun may have been restocked.

https://i.imgur.com/zcADQV8.jpg

This one seems to be wearing a hard rubber butt plate (period correct)
which Schwing says was an option. Not my first choice.

https://i.imgur.com/xadpcrl.jpg

Both of mine have same hard plate, with top screw set at slight downward angle. Both happen to be early year productions under 1k serial number. My wood has the Win red coloring, not as walnut as yours. But mine aren't the Tournament Grade.
both are Field models. Both also have same exact stock dimensions as yours.
Matt k

The reason I asked Matt is that a great many Tournament Skeet’s came from the factory with a checkered butt. Many of those I’m certain were lost to a recoil pad for the sake of LOP.
My concern with this particular gun is that it may have been restocked and as a money or time saver may have acquired a butt plate.

My 20ga Tournament has a hard buttplate. It's not a skeet gun chokes are cyl & mod.

By definition a Model 21 G2190B came with a checkered butt.

The Model 21 Skeet Gun came out during 1932 but didn't make it into the 1932 catalog, but Winchester put out flyers.

In the 1933 Winchester catalogs the Model 21 Skeet Gun was only offered with a straight grip. The big 1933 catalog --

Attachment 132188

the 1933 pocket catalog --

Attachment 132189

By the 1934 Winchester catalogs they added a pistol grip Model 21 Skeet Gun. The big 1934 Winchester catalog --

Attachment 132190

From the 1934 Winchester pocket catalog --

Attachment 132191

Attachment 132192

They all list a checkered butt.

The letter for my 1940/41 16-gauge Model 21 Skeet Gun doesn't say anything about the checkered butt, which it has.

Attachment 132195

Attachment 132194

January 2, 1941, Winchester Wholesale - Retail Price List --

Attachment 132193

My 1952 Skeet 20 gauge has a plate, however the letter states make lightweight. The butt is hollowed out. With 26” barrels it is 6 lb 5 oz.

I used to own a Model 21-20 gauge skeet(made in 1948) that had and lettered with a checkered butt. My 20 gauge Grand American(started in 1964 and finished in 1965) with one set of the barrels being skeet and skeet has the leather covered pad. I wouldn't write off your stock just yet as the Winchester 21's were custom ordered and could be had with a variety of butts.(hard plastic-checkered -rubber-leather covered rubber and leather faced rubber are the options the factory advertised. It would have been nice if the factory would have kept all the work orders and a person could have seen how the customer ordered the gun. My Grand American came with the work orders and factory letter and the gun letters to a tee. With this being said almost all the factory winchester catalogs list the skeet with a checkered butt. Since your letter doesn't list the checkered butt- I would think that would be a plus as far as possibly being originally stocked with a plastic butt.

The Cody information the OP posted shows the gun was "made for: Stock," it wasn't in any way special ordered. A gun that just flowed through the normal channels from Winchester to Jobber, to wholesaler, to retailer, to customer.

Attachment 132209

So are we saying since it wasn’t a custom ordered gun it would have had the cataloged
checkered butt and not a butt plate?