Spot on pre 64 Winchester Model 70 Featherweights 1952–1963 almost always came with factory iron sights typically a Marble's 69 or Lyman 16B folding rear dovetailed directly to the barrel no boss and a bead front on a ramp. It was standard for the lightweight contour, and catalogs owner photos confirm it.
Post 64 1964 onward, Winchester shifted hard to scoped rifles iron sights became rare or special order only. The redesign lighter stock, push feed action prioritized scope use, so most Featherweights when reintroduced in the '80s as XTR shipped without factory irons drilled tapped only, no sights. By the late '60s and into modern runs, open sights were basically phased out unless custom requested.
Your observation matches what collectors see pre64s sights standard, post 64s scopes dominant, irons uncommon. If you're hunting a pre 64 with original sights, they're still out there but command premiums. Seen any specific year or caliber you're eyeing?