Well, I've learnt something new tonight then. I wasn't aware of that, & I bought eight of them! All were genuine scopes in genuine rings. I now also don't feel so bad for neglecting to note down which scopes were mated to which rings! As an aside, my then machinist made a small quantity of reproduction mount base rails so that Pete could sell some of them as 'kits'. I wish we could buy them back now for the price we sold them for then!