I have found in the back of my cupboard an interesting reflex sight, still boxed in it's yellow cardboard box complete with instructions..
It is a BSA RS1 and comes with an integral mount.
It states on the box that it is suitable for air rifles and .22 rifles with nominal dovetail of 11.5mm.
I can't remember using it but it has been used at some time, I reckon it is about 1960's vintage so, far from new.
If anybody has any interest in this, as it isn't particularly light, I reckon postage will be around a fiver, I reckon another fiver and you can have it.
Snap it up before a Museum does