Excellent condition Mod 1910 (.401WSL cal) are usually in the $1500 and up range.
The .351WSL caliber version is a Model 1907
The 2nd and 3rd from the left in the rack I think are M1907's and may be later mfg 'Police' rifles.
They appear to have the heavier stock and foreand.
The butt stocks look like they have the slightly rounded 'toe' to the butt. These would have a steel butt plate. The normal butt plate would be the HardRubber/Plastic w/a Winchester logo on it.
Sling & Swivels were an option on any of the rifles but standard on the 'Police' M1907 rifle IIRC.
Front swivel was riveted to the forend cap. The rear swivel on the Police rifle was a swivel and base affair. The base secured with 2 wood screws to the stock. A Military type swivel.
I think the plain rifles and the Graded guns (fancy) got a plain single wood screw shank into the wood swivel attachment in the butt stock.
The hooked op rod end on those two was a feature of the Police rifle but it was also used on the later mfg plain .351 rifles as well.
You could order the '07 Police with a Bayonet as well.
The bbl was heavier weight/larger in dia to accept the bbl ring of the bayonet securely at the muzzle. These don't appear that they are.
The bayonet supplied was the US Krag rifle bayonet.
Plain Mod 1907 rifles usually get priced in the $700 range for shooter's.
+/- of course for condition.
Really nice examples are over 1K.
Police models get extra value, usually over 1K
Make sure the magazine is a Winchester orig.
The mag body was made of one (1) piece of steel. A deep draw process that stretched the flat piece of steel into a the magazine shape including the base.
There will be no separate sides or bottom plate,,all one piece.
The bottom will be roll marked 'Winchester along with the caliber.
Orig magazines are very expensive. Usually over $100 each.
.401 cal magazines are hard to find. There are aftermarket around.
There are some '351 cal French mfg magazines that are quite nice that were made during WW1 IIRC. These are quite valuable as a collectible and function well too.
Forends on all of the Win S/L rifles are prone to cracking. Models 1905, 1907, 1910.
Check carefully for cracks and/or repairs.
Butt stocks are usually quite stout but they also can crack at the grip.
If it's intended to be a shooter, the recoil buffer inside should be examined before doing so. It's a simple fiber buffer and with the age of these rifles and if a lot of use, that buffer can disintegrate . That allows some hammering of parts that you don't want to happen. They are inexpensive in themselves. Taking the rifle apart and reassembling can be quite an experience in fighting the bull recoil spring that is the heart of these rifles. There are a couple ways to capture and hold the spring in doing work on these. A little time invested in research on Mr Gore's WWW will reveal some ideas that work quite well.
The 351 caliber was also offered with a 10rd extended mag.
I don't know off hand if those were the same one piece deep draw type mfg as the short 5rd .351 mags were.
The 401 only came with the short mag which is only a 4rd capacity.
The other rifle in the series of self loaders was the Model 1905.
It came in calibers 32 WSL and 35WSL.
