Naw, don't sell it
you'll wish you hadn't.
When I say don't clean it, I mean the bore. .22 barrels have relatively mild steel. Many a fine .22 has been ruined by zealous barrel cleaning, which wears it down far more than several lifetimes of shooting would do.
I too am puzzled by the "six-piece stock". What you have is definitely not a sporter stock; it's a standard Winchester target stock of the period. I looks intact and correct. The nose of the stock, ahead of the barrel band, is longer in rifles of this era than in the later 52Bs.
I'd say you have a pre-A Speed Lock rifle; mine is similar though not stainless and has serial # 182XX, made in October 1929.
The wall of the receiver at the ejection port is level with the wood on both sides, whereas later thay raised the left side for greater strength. The scope blocks on the barrel are typical.
Of note, I think they made a few aluminum-barrel rifles. Does yours attract a magnet? If it's aluminum you have a true rarity, and you especially don't want to clean it.
I have a 1948 52B which has been in a fire, I think. There's lots of pitting and blotchiness of the bluing. The stock is a correct 52B but must be a replacement if it was in a fire. It was crudely shortened and hs a crack near the bolt handle. There is a ring in the bore about 14" back from the muzzle. A Redfield receiver sight was crudely inletted into the stock. The dealer let me take it home, clean it (just once!) and test-fire. One inch at 50 yds. Bought it for $150. Glass bedded it and scoped it. It shoots honest-to-God quarter inch groups at 50 yd with Win. Power Points, often 0.2" or better.
I couldn't find a replacement stock anywhere, and so I had Wenig Custom make one for me, rough-inletted and rough-shaped, and left-handed , with a lefty palm swell and cheekpiece on the right. Spent this week polishing the metal and inletting it before I glass-bed. Maybe I'll post some photos in a separate thread.
But anyway, you have a truly superb rifle there, and if you like to shoot at all you should shoot it a bit before you think of selling it. There won't be any more.