I like the irons on my double rifles.

I think that the most modern one was built right around 1880.
It's a magnum express rifle and doesn't have flip sights, just one unmarked shallow vee and a slender little blade up front.

None of them have been altered to handle telescopic sights.

If my eyesight goes to hell I'll first look at lasic before I look for scope mounts.
We shall see...

Cheers
Tinker