The fact that they have material content marked on them (Vero Cuio - real leather) and the leather hide symbol suggest they no earlier than late 1960s to me (I see these labels begin to appear shortly before various laws worldwide came into force in 1970 requiring material content to be marked on items for sale) but besides this the cut and inserted fabric label, and the font used inside the shoe both say 1980s to me. They do look like a higher quality brand, with nice leather soles and a true 1950s retro style.
No not all 1950s shoes had metal heel tips - most I find had leather, but with the introduction of stilettos it was found that the tips wore down quickly. Some metal stiletto tip styles I have only seen on 1950's shoes (flared circular steel, and a drum shape with ridged sides like a coin)- I guess this was experimentation until they found what worked best. The biggest difference is they used to attach small heel tips with small screws, even the metal ones, later decades use a tubular invention which the bang on replacement sort available today.
Of course it's worth remembering heel tips can't be used for dating unless you are pretty sure they are original, as they could have been changed at any point in their history, and a good cobbler can make it hard to tell they were replaced, using similar methods & materials.