In the same magazine W. Parr (Firearms) International is advertising "Military Rifles Bored to .410". Several flavours of Mauser from ?75-?80, SMLE & No4 for 90 and 85, and just for good measure, a .410 Bren for ?350.
But thinking back - it was probably more like the late 60's / early 70's. I was married with kids by 1980
Those were the days my friend, we thought they'd never end ..........................
Mine are not the best, but they are not too bad. I can think of lots of Enfields I'd rather have but instead of constantly striving for more, sometimes it's good to be satisfied with what one has...