Lyman 17A front sight
Lyman 48L (receiver) for the rear sight.
For the 417/418 models of the Walnut Hill rifle.
From the info I have.
I think an extended rear adjustable 'peep' sight was also offered, but I can't find info on it.
Added:
The extended rear adj peep sight option was the 'Lyman 52L Extended Recv'r Sight'.
AFAIK the Walnut Hill rifles didn't come with a tang sight. It used the Lyman '48L' Micrometer adj rear sight attached to the left side of the rec'vr wall.
The 52L sight extension attached to the same position and placed the micrometer sight about 3 inches to the rear for the shooter.
They were all made on the Model 44 action but nicely fitted for better accuracy
These versions (417, 418, 417 1/2, 418 1/2) are 1930's made rifles and discontinued just after WW2.
An early single shot Stevens made Walnut Hill model was made on the 44 1/2 action,,a completely different rifle (pre-1915)
These 417/418 model rifles are actually Savage manufacture as Savage bought out Stevens in the early 1920's, but kept their name as part of their mfg'rg & marketing. Used their old factory too.
Early Stevens tang sights used a very small screw for mounting. IIRC it's a #4-48.
I don't recall the 417/418 as being D&T for tang sight but anything is possible with the Stevens/Savage single shots.
I think the 414 Armory Rifle was discontinued when these were introduced. These would be the last of the run of the old Single Shots from them.
Some retro Favorites in the 70's or 80's IIRC