Here in Scotland we pretty much all use telescopic sights. Indeed most use a 4-12x50 or 56 type scope, if not more powerful, all with lots of clicky turrets etc.

Go back 30 years a 4x32 or a 6x42 was considered a powerful optic.

With the David Lloyd rifles you need look at them with regard to when the were built. David Lloyd died in the mid 1990’s in his 80’s.

When he developed and patented his mounting system most sporting rifles still were open sighted and if scoped, scope mounts were flimsy affairs easily knocked off zero. The David Lloyd Rifles were built to maintain zero and they generally did very well.

In the past when a Gentleman or a Lady bought a rifle the rifle “shot and regulated” for a particular ammunition. Open sights would be filed in for such ammo, and scope zeroed for such ammo.